According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2008 Infiniti G37 has 20 documented known issues, with 8 rated critical. The most serious are OCS Varistor Defect Suppresses Passenger Airbag (Recall 08V521000) ($0-$0 repair), VVEL Actuator and Control Module Failure Causing Limp Mode ($600-$3,000 repair), Timing Chain Stretch and Guide Wear on VQ37VHR ($1,800-$4,000 repair), Cam Cover Gasket Leak Causing Low Oil Pressure ($400-$1,400 repair), Oil Gallery Gasket Leak ($400-$1,200 repair), Electronic Steering Lock Failure ($300-$1,000 repair), Concentric Slave Cylinder Failure (Manual) ($800-$2,000 repair) and Crankshaft Position Sensor Failure Causing Hot Stall and No-Start (P0335) ($80-$350 repair). Across all issues with published estimates, repair costs range from $60 to $4,500. DIY maintenance guides at .
NISSAN IS RECALLING CERTAIN MODEL YEAR 2011 AND 2012 INFINITI G37 COUPE VEHICLES AND CERTAIN MODEL YEAR 2011 NISSAN 370Z VEHICLES MANUFACTURED FROM JULY 2, 2011, THROUGH AUGUST 29, 2011. DUE TO A PROGRAMMING ERROR, THE POWER WINDOW SWITCH CONTROLLER IN THE SUBJECT VEHICLES WAS MANUFACTURED OUT OF SPECIFICATION.
Campaign #11V53800004/11/2011
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2008 Infiniti G37 has 20 documented issues. The most frequently reported are: OCS Varistor Defect Suppresses Passenger Airbag (Recall 08V521000), VVEL Actuator and Control Module Failure Causing Limp Mode, Timing Chain Stretch and Guide Wear on VQ37VHR. Of these, 8 are rated critical and should be addressed promptly.
Is the Infiniti G37 reliable?
The 2008 Infiniti G37 has 20 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 8 issues are rated critical: OCS Varistor Defect Suppresses Passenger Airbag (Recall 08V521000) and VVEL Actuator and Control Module Failure Causing Limp Mode and Timing Chain Stretch and Guide Wear on VQ37VHR and Cam Cover Gasket Leak Causing Low Oil Pressure and Oil Gallery Gasket Leak and Electronic Steering Lock Failure and Concentric Slave Cylinder Failure (Manual) and Crankshaft Position Sensor Failure Causing Hot Stall and No-Start (P0335). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Infiniti G37 problems?
Repair costs for known Infiniti G37 issues range from $0 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, OCS Varistor Defect Suppresses Passenger Airbag (Recall 08V521000), typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2008 Infiniti G37 OCS Varistor Defect Suppresses Passenger Airbag (Recall 08V521000)?
A varistor inside the Occupant Classification System control unit in the front passenger seat cushion was manufactured out of specification and can interrupt the signal between the OCS and the airbag control unit. When that signal is lost the airbag control unit suppresses the pa… Repairs typically run $0-$0. Severity: high.
What is the 2008-2013 Infiniti G37 VVEL Actuator and Control Module Failure Causing Limp Mode?
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
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On the 2008-2013 Infiniti G37 VQ37VHR, the VQ37VHR uses Variable Valve Event and Lift, a mechanical system on the intake side that varies lift continuously through an actuator motor driving a control shaft, managed by its own control module. When the actuator motor, the control shaft position sensor, or the VVEL module fails, the engine drops into a severe limp mode with essentially no throttle response — the car becomes undrivable rather than merely down on power. Owners typically see a scatter of seemingly unrelated codes alongside the failure, which sends diagnosis in the wrong direction. Contributing factors include oil starvation and sludge in the VVEL assembly from extended oil change intervals, and moisture or connector corrosion at the module.
Common Symptoms
Severe limp mode with no throttle response
Check engine light with multiple simultaneous codes
Rough idle or stumbling
Sudden loss of power while driving
Ticking or whirring from the top of the engine
How to Fix
Do not let a shop start replacing sensors on a scattergun basis. Have the VVEL actuator motor, control shaft position sensor, module, and their connectors checked as a system, including power and ground at the module — corroded or backed-out connector pins mimic a failed actuator and cost nothing to fix. Be aware that replacement is not a bolt-on job: the VVEL actuator assembly and control shaft position sensor are designated non-reusable once removed, and installation requires a calibration and relearn procedure with dealer-level tooling, which puts this beyond most DIY work. Keep oil changes at 5,000 miles with the correct full synthetic — the VVEL assembly is oil-fed and sludge is a direct cause of actuator failure. Diagnose it promptly rather than driving in limp mode, since continued operation risks damage to the exhaust camshaft.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Infiniti VVEL control module 23751-JK00B
OEM23751-JK00B
Confirm VIN/build date returns 23751-JK00B and complete required initialization; do not substitute for 23751-3EV0A by mode
Bank/passenger-side actuator branch after testing proves that assembly failed Fitment/availability: Current supersession 23745-EY06A fits listed 2008-2013 G37 VQ37VHR applications and replaces earlier A-suffix revisions. It is side-speci…
Bank/driver-side actuator branch after testing proves that assembly failed Fitment/availability: Current supersession 23745-EY06B fits listed 2008-2013 G37 VQ37VHR applications and replaces earlier B-suffix revisions. Do not swap sides o…
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On the 2008-2013 Infiniti G37 VQ37VHR, the VQ37VHR runs three timing chains — a primary and two secondaries — with plastic guides and hydraulic tensioners. The chains stretch and the guides wear, and because the tensioners rely on oil pressure to take up slack, any oil pressure loss or extended change interval accelerates it sharply. The first symptom is a rattle from the front of the engine on cold start that lasts a second or two until pressure builds, progressing to a rattle that persists at idle. Left alone, stretch pushes cam timing out of correlation and sets timing codes; in the worst outcome the chain skips or a guide fragments, and on this interference engine that means bent valves.
Common Symptoms
Rattle from the front of the engine on cold start
Rattle that persists at idle once warm
Check engine light with cam or crank correlation codes
Rough running or reduced power
Whining or chain slap that changes with RPM
How to Fix
Treat a front-of-engine rattle on cold start as a timing chain issue and act on it rather than waiting for a code — chain, guides, and tensioners replaced proactively is a fraction of the cost of a destroyed engine, though it is still a substantial job because the front cover comes off. Have the shop scan for cam and crank correlation codes and check actual cam timing against spec. Critically, verify oil pressure at the same time: on this engine the chain rarely wears out on its own, it wears out because oil pressure dropped from a leaking cam cover or oil gallery gasket, and replacing the chain without fixing the pressure loss just repeats the failure. Change oil every 5,000 miles with full synthetic instead of following the extended factory interval. On a used purchase, insist on a genuine cold start before buying.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
OEM VQ37VHR timing kit
OEMZ1-configured Nissan OEM VQ37VHR timing kit
Confirmed VQ37VHR chain/guide/tensioner repair Fitment/availability: Configure the exact G37 model year and choose the required chains, guides and cam-chain tensioners. Do not buy from noise alone; compare included components with the VI…
OEM VQ35HR/VQ37VHR timing-cover O-ring and seal kit
OEMNissan OEM VQ35HR/VQ37VHR timing-cover O-ring and seal kit
Conditional disturbed-seal bundle for the front-cover timing procedure Fitment/availability: Match kit contents to the exact VQ37VHR service procedure and VIN. It supports front-cover reassembly but does not diagnose or repair chain wear…
On the 2008-2011 Infiniti G37 VQ37VHR, on pre-2012 VQ37VHR engines the cam cover gaskets fail and leak, and unlike an ordinary valve cover weep this one matters mechanically: the leak path bleeds down oil pressure feeding the top end. Low oil pressure on this engine starves the VVEL assembly and the cam and rod bearings, and owners who dismiss the leak as a minor seep have lost engines to it. The visible signs are oil pooling in the spark plug wells, oil on the exhaust manifolds producing a burning smell and smoke from under the hood, and a low oil pressure warning or gauge reading that comes up at idle when hot.
Common Symptoms
Oil pooled in the spark plug wells
Burning oil smell and smoke from the engine bay
Low oil pressure warning, especially at hot idle
Visible oil on the exhaust manifolds or down the block
Misfires from oil-fouled ignition coils
Ticking from the top end that worsens when warm
How to Fix
Treat a cam cover leak on a pre-2012 G37 as urgent rather than cosmetic, particularly if it is accompanied by any low oil pressure indication. Replace both cam cover gaskets along with the spark plug tube seals and the half-moon seals, and inspect the plug wells for oil that has soaked the coil boots — oil-fouled coils cause misfires that get misdiagnosed as ignition failure. Verify actual oil pressure with a mechanical gauge rather than trusting the dash indication before and after the repair. If pressure remains low with the gaskets fixed, stop driving the car and investigate the oil pump and pickup, since continued operation at low pressure will destroy the bearings. Use OEM gaskets here; aftermarket sets have a poor record of resealing on this engine.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
OEM VQ37VHR valve-cover gasket and tube-seal selections
OEM13270-EY01A / 13270-EY01B / 13271-EY00A
Confirmed external valve-cover leak repair with selectable left/right gaskets and tube seals Fitment/availability: Fits 2008-2013 G37 Coupe and the listed later Sedan/Convertible VQ37VHR branches.
Small specified-joint sealant branch for the valve-cover procedure Fitment/availability: Use only at the service-manual junctions and in the specified bead size; it does not replace molded cover gaskets and excess RTV can contaminate oil…
On the 2008-2013 Infiniti G37, the VQ37VHR engine develops oil leaks from the oil gallery gaskets located between the upper and lower oil pans. Oil seeps onto the exhaust, creating a burning smell and potential fire hazard if left unaddressed.
Common Symptoms
Burning oil smell from engine bay
Oil dripping on exhaust manifold
Visible oil seepage on lower engine block
How to Fix
Replace the oil gallery gaskets, which requires removing the lower oil pan. Use updated Nissan/Infiniti gaskets that have improved sealing material. Clean all mating surfaces thoroughly before reinstalling.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Updated gallery-gasket and fastener repair kit after confirmed internal pressure leakage Fitment/availability: Fits the listed VQ37VHR G37 applications and includes two updated composite-steel gaskets, two O-rings and 20 Allen bolts. Con…
On the 2008-2013 Infiniti G37 VQ37VHR, the crankshaft position sensor mounted on the transmission bell housing of the VQ37VHR is a documented failure point on G37s past about 80k miles. It typically fails when hot: the engine stalls after warm-up or extended driving, cranks without starting until it cools, then restarts normally. P0335 is stored. Owners who fit cheap aftermarket sensors report repeat failures, so the community advice is OEM or Hitachi only.
Common Symptoms
Engine stalls when hot
Cranks but will not start until cooled
Intermittent rough running
Check engine light with P0335
How to Fix
Replace the crankshaft position sensor with an OEM Nissan/Hitachi unit (passenger side of the bell housing); clear codes. If P0340/P0345 accompany it, the camshaft sensors on top of the engine are separate parts and should be diagnosed on their own. No recall.
On the 2008-2010 Infiniti G37 VQ37VHR, early-production VQ37VHR engines consume noticeably more oil than owners expect, and the 2008-2010 build years are the most affected. The consumption is real rather than imagined leakage, driven by ring and cylinder wear characteristics on early blocks, and it is aggravated by hard driving and by the long factory oil change interval. The practical danger is not the oil itself but what running low does to the rest of the engine: the VVEL assembly and the timing chain tensioners are oil-pressure dependent, so an owner who tops up only when the light comes on is quietly setting up a far more expensive failure.
Common Symptoms
Oil level low between scheduled changes
Low oil level warning light
Consumption of roughly a quart every 2,000 to 3,000 miles
Blue smoke on startup or under hard acceleration
Fouled spark plugs at higher mileage
How to Fix
Establish the actual consumption rate over a measured interval before doing anything else — check the level on the dipstick at every other fuel fill, on level ground with the engine warm and shut off for several minutes. A quart every 2,000 to 3,000 miles on an early VQ37VHR is common and is managed by topping up, not by opening the engine. Rule out the cheap external causes first, because they mimic consumption: the cam cover gaskets and the oil gallery gasket both leak on this engine and are far more likely than ring wear on a car with visible oil in the plug wells or on the block. Shorten the oil change interval to 5,000 miles with the correct full synthetic, and carry a quart in the trunk. Blue smoke on startup after sitting points to valve stem seals; smoke under sustained load points to rings.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Mobil 1 Extended Performance 5W-30 full-synthetic motor oil, 5 qt
OEMMobil 1 Extended Performance 5W-30 — 5 qt
Confirm total service capacity; oil does not repair a leak, PCV fault, valve seals, rings or bores.
On the 2008-2013 Infiniti G37 VQ37VHR, the Hitachi coil-on-plug units on the VQ37VHR are a recurring failure item on higher-mileage G37s. Heat and electrical stress cause the coil body to blister or bulge, producing a random or single-cylinder misfire, rough idle and flashing check-engine light. Infiniti's bulletin ITB11-017A (cited by owners and parts guides) tells technicians that a P0300-P0306 misfire with a blistered, deformed or melted coil outer surface indicates coil failure. On the VQ37 the rear bank coils are buried under the intake plenum, which drives labor cost.
Common Symptoms
Rough idle or shaking at idle
Flashing check engine light under load
Misfire counts on one or more cylinders
Hesitation and power loss
How to Fix
Replace the failed coil (and inspect all six for blistering); most shops replace all six with spark plugs once the first fails past 80k miles. Use OEM Hitachi coils—aftermarket units have a poor reputation on this engine. If coils fail repeatedly, check engine grounds. No recall.
On the 2008-2013 Infiniti G37, like the G35, the G37 suffers from electronic steering wheel lock actuator failures that prevent the vehicle from starting. The internal motor in the lock mechanism burns out or the control module loses communication with the BCM.
Common Symptoms
No-start condition with push button
Steering wheel locked and will not release
NATS warning light illuminated
How to Fix
Replace the steering lock actuator assembly. Nissan issued a voluntary service campaign for some VINs covering this repair. Check with the dealer for coverage before paying out of pocket.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Infiniti steering-lock set D8700-JK000
OEMD8700-JK000
Exact early G37 steering-lock branch after system diagnosis and VIN confirmation Fitment/availability: Catalog fitment includes 2008-2012 G37 variants, but production and option differences remain. Confirm the VIN returns D8700-JK000, ve…
On the 2008-2013 Infiniti G37, the hydraulic power steering circuit on the G37 develops leaks at the high-pressure hose, its crimped hard-line sections and the reservoir-side return hose as the rubber ages. Owners describe fluid coating the underside of the car, a whine from the pump when low, and difficulty pinpointing the source; some report repeated hose failures. Because the pressure line routes close to the exhaust and engine, heat accelerates the degradation.
Common Symptoms
Power steering fluid dripping under the front of the car
Whining from the pump, especially when turning
Reservoir needs frequent topping up
Heavy steering when fluid runs low
How to Fix
Clean the area, pressurize and locate the leak, then replace the affected pressure hose/hard line (OEM or Gates/Edelmann equivalents around $130-150 in parts) and the return hose if soft; refill with the specified fluid and bleed. Persistent pump whine after a long dry spell may require pump replacement. No recall.
On the 2008-2013 Infiniti G37 3.7L VQ37VHR V6, manual transmission G37s suffer from premature concentric slave cylinder (CSC) failure. The internal seal degrades, causing clutch fluid to leak into the bell housing and resulting in a soft or sinking clutch pedal.
Common Symptoms
Soft or spongy clutch pedal
Clutch pedal sinks to floor
Difficulty shifting gears
Clutch fluid level dropping
How to Fix
Replace the concentric slave cylinder, which unfortunately requires transmission removal. Many owners upgrade to an aftermarket CSC with improved seals. Flush the clutch hydraulic system after replacement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
ZSpeed Billet CMAK V4 external slave-cylinder kit
OEMZSP-CMAKB-370 — Billet CMAK V4
G37 six-speed-manual CSC elimination repair path Fitment/availability: Select the 370Z/G37/G35S/Q60 configuration and confirm the installed clutch/fork setup.
Alternative exact G37 six-speed external-slave conversion Fitment/availability: Fits the listed 2008-2013 G37 manual-transmission applications and requires selecting the clutch type. Do not order for an automatic or assume one configurat…
On the 2008-2013 Infiniti G37 VQ37VHR, the FS6R31A 6-speed manual fitted to G37 Sport/6MT cars develops synchro grind, most often on 2nd, 5th and 6th (some report 3rd) during quick upshifts or when skipping gears. It is usually masked when shifting gently and shows up under spirited driving. Early in the car's life Infiniti replaced complete gearboxes under warranty—some owners report two or three replacements—while other dealers denied a known problem. The same brass synchro weakness is shared with the 370Z.
Common Symptoms
Grinding or scratching when shifting into 2nd, 5th or 6th
Lockout or notchiness on fast upshifts
Grind worse when cold or when skipping gears
How to Fix
Within warranty, dealers replaced the transmission assembly. Out of warranty, options are a fluid change to a synchro-friendly GL-4 oil (which reduces but rarely eliminates grind), a rebuild with upgraded carbon synchros (Synchrotech kits are the common aftermarket path), or a used/remanufactured gearbox. No recall or extended coverage exists.
On the 2008 Infiniti G37, a varistor inside the Occupant Classification System control unit in the front passenger seat cushion was manufactured out of specification and can interrupt the signal between the OCS and the airbag control unit. When that signal is lost the airbag control unit suppresses the passenger frontal airbag, so it will not deploy in a crash even with an adult properly belted in the seat. NHTSA campaign 08V521000 covers the 2008 G37 Coupe together with 2007-2008 G35 sedans, EX35, and several Nissan models, totaling 204,361 vehicles. The recall began November 4, 2008.
Common Symptoms
Passenger airbag status light reads OFF with an adult seated
Airbag status indicator flickers between ON and OFF
SRS warning light illuminated
Seat read as empty while occupied
How to Fix
Have the dealer test the OCS-to-ACU signal using the special tool specified in recall 08V521000 and replace the passenger seat cushion assembly if it fails, free of charge. Check the passenger airbag status light on the console with an adult in the seat — an OFF indication means the bag is suppressed right now. Remove aftermarket seat covers and clear anything stored beneath the passenger seat before diagnosis, as both confuse the sensor mat. Do not disconnect the OCS to extinguish the warning light; that disables the crash logic entirely.
On the 2008-2009 Infiniti G37, the dashboard topper material degrades under sustained sun and heat, first going soft and tacky, then developing shiny patches, cracks, and chipping — usually starting at the defroster vents and the instrument binnacle. The degraded surface turns reflective and throws glare onto the windshield severe enough to interfere with forward vision in low sun, which makes this a visibility problem rather than a purely cosmetic one. The defect is documented across 2008-2009 G37 alongside 2006-2008 G35 and M35 and was the subject of class-action litigation against Nissan. Nissan extended warranty coverage for melting dashboards on certain other vehicles but did not extend it to these models.
Common Symptoms
Dashboard soft, tacky, or sticky to the touch
Shiny reflective patches causing windshield glare
Cracks and chipping near the defroster vents
Discoloration or bubbling of the dash surface
Glare obscuring forward vision in low sun
How to Fix
Expect this to be out of pocket, though one call to Infiniti Consumer Affairs with the VIN costs nothing and dealer goodwill has occasionally applied. Options in ascending cost: a fitted dash cover or carpet-style mat, which eliminates the glare for well under a hundred dollars and is where most owners land; a vinyl or leather re-wrap by a trim shop; or full dashboard replacement, expensive mainly because the labor requires pulling the steering column and HVAC ducting. Do not apply silicone-based interior dressings to a dash that has already gone soft — they worsen the tackiness and attract dust into the surface. Using a windshield sunshade whenever parked meaningfully slows the degradation on a dash that has not yet failed.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
2008 G37 Coupe glare-control branch Fitment/availability: Custom 2008 G37 Coupe pattern; select the exact speaker/cutout configuration and a dark color. There is no 2008 Sedan branch.
The live catalog includes a black Coverlay ABS cover with speaker cut-out; verify Coupe versus Sedan/Convertible fitment in the item notes before purchase and do not block airbag or def
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On the 2008-2009 Infiniti G37, separate from the melting dashboard, the painted/soft-touch coating on the steering wheel spokes and rim of 2008-2009 G37s (and 2007-2008 G35 sedans sharing the wheel) peels and chips, often before 50k miles. A 25-plus-page G35Driver thread and multiple MyG37 threads document owners getting the wheel replaced under warranty; Infiniti issued a bulletin acknowledging the defect but many cars were already out of warranty by then, and some dealers offered a repaint instead of replacement.
Common Symptoms
Coating peeling off steering wheel spokes
Chipped or flaking finish on the rim
Sticky or worn feel on the wheel surface
How to Fix
Under warranty or goodwill, dealer replacement of the steering wheel assembly. Out of warranty, options are a replacement wheel from a later-year car (revised finish), leather re-wrap, or a professional refinish. No recall.
On the 2008-2013 Infiniti G37, water entering the sunroof tray is meant to drain through four tubes routed down the A- and C-pillars. Debris blocks the drain nipples at the tray corners, the tray overflows, and water runs into the headliner and down the pillars into the cabin. Owners report soaked footwell carpet, water dripping from the headliner or map light, and a persistent musty smell. Because the water follows the pillars past wiring and body modules, it commonly surfaces as electrical faults first, and a car with unexplained module behavior and damp carpet is almost always leaking here rather than suffering an independent electrical failure. This is the leading cause of interior water intrusion on the chassis.
Common Symptoms
Wet or damp footwell carpet
Water dripping from the headliner or map light area
Persistent musty or mildew smell
Unexplained electrical faults or modules behaving erratically
Water stains on pillar trim
Interior glass fogging that will not clear
How to Fix
Open the sunroof and find the drain openings at the four corners of the tray. Clear them with low-pressure compressed air or soft weed-trimmer line fed in gently. Never use a stiff wire or drain snake: it punctures the tube inside the pillar and turns a clogged drain into a permanent leak that is far harder to fix. Pour a little water into the tray and verify it exits behind each wheel. On a car with damp carpet, pull the carpet and padding up and dry them completely rather than letting them dry in place, since trapped moisture corrodes connectors and modules under the seats. Resolve this before diagnosing any electrical complaint on a wet car. If the leak continues with drains flowing freely, the sunroof seal has failed or a drain tube has come off its nipple behind the pillar trim.
On the 2008-2013 Infiniti G37, front hub bearings on the G37 (sedan, coupe and especially the heavier AWD G37x) fail well before most owners expect, typically between 50k and 90k miles. The symptom is a hum or drone above roughly 45-50 mph that changes pitch when the car is loaded in one direction (louder turning one way, quieter the other) and can be felt as vibration through the steering wheel. Owners report repeat failures and both sides eventually going.
Common Symptoms
Humming or droning above 45-50 mph
Noise changes when steering left or right
Steering wheel vibration
How to Fix
Replace the complete hub/bearing assembly (the bearing is not serviced separately). It is a bolt-on unit and a common DIY job; dealers charge considerably more. Several owners had CPO coverage honor the repair. No recall.
On the 2008-2011 Infiniti G37 VQ37VHR, early G37s develop coolant leaks from the upper radiator hose assembly and its plastic bleeder/connector fittings, which embrittle with age and heat and can split suddenly. Owners report sudden coolant loss and overheating warnings, dried coolant residue around the thermostat housing, and repeat leaks after a hose is replaced because the multi-piece OEM hose assembly has several joints. The plastic bleed port is repeatedly named as the weak point.
Common Symptoms
Coolant puddle or sweet smell after driving
Low coolant or overheating warning
Dried coolant residue near the thermostat housing
Sudden loss of coolant from a split hose
How to Fix
Replace the upper radiator hose assembly (OEM is a three-piece assembly, roughly $100 in parts) including the plastic bleed fitting; inspect the lower hose and pressure-test the system to rule out a cracked radiator. Bleed the cooling system properly afterward. No recall.
On the 2008-2013 Infiniti G37, g37 fuel gauges commonly read wrong as the cars age: the needle sticks at half or full, drops suddenly, or the low-fuel light comes on with fuel remaining. The saddle-style tank uses a main and sub level sensor; wear on the float-arm resistor track in either sender produces erratic readings. Because the fuel data passes through the body/AC control electronics before the cluster, owners have chased wiring and even module faults after replacing a sender. There is no known TSB, but the fault is well documented across MyG37 and G35Driver.
Common Symptoms
Fuel gauge stuck at half or full
Gauge reading drops suddenly
Low fuel light with fuel remaining
Range display inaccurate
How to Fix
Read the sender resistance (roughly 3 ohms full to ~80 ohms empty on the main sender, ~41 ohms empty on the sub) and replace the worn fuel level sensor unit(s) through the rear-seat access panel; verify harness connections to the cluster if readings remain wrong. No recall.
On the 2008-2013 Infiniti G37, owners across model years report the G37's air conditioning gradually blowing warm as refrigerant escapes, most often from the compressor shaft seal, the high-pressure service fitting or cutoff-switch O-rings, and occasionally the condenser. The system holds only about 1.1 lb of R-134a, so a small leak empties it quickly and the compressor clutch stops engaging on low pressure. CarComplaints lists 'A/C blowing warm air' among the top 2013 G37 problems at roughly $2,800 average repair cost.
Common Symptoms
A/C blows warm or only cools briefly
Compressor clutch does not engage
Oily residue on compressor or high-side fitting
Refrigerant needs recharging repeatedly
How to Fix
UV-dye leak test; replace the leaking compressor (with receiver/drier and expansion valve), fitting O-rings or condenser as found, evacuate and recharge to the specified 1.1 lb charge—overcharging causes poor cooling. Confirm the clutch relay and pressure switch before condemning the compressor. No recall.
On the 2008-2013 Infiniti G37, on Bose-equipped G37s the trunk-mounted amplifier is the most common audio failure. Sound cuts out entirely or intermittently with no error on screen—the head unit, navigation and controls keep working, but nothing comes from the speakers. Owner diagnosis on G35Driver and MyG37 starts with the BOSE AMP fuse and the head-unit self-diagnostic, which shows the amp not communicating; internal solder-joint failure is the usual root cause.
Common Symptoms
No sound from any speaker while the head unit works
Audio cuts in and out
Self-diagnostic shows amplifier not responding
How to Fix
Confirm the BOSE AMP fuse and run the head-unit self-diagnostic. Replace the amplifier (used units are inexpensive; new OEM is several hundred dollars) or have the original board repaired; some owners bypass with an aftermarket amp. No recall.
The VQ37VHR uses Variable Valve Event and Lift, a mechanical system on the intake side that varies lift continuously through an actuator motor driving a control shaft, managed by its own control module. When the actuator motor, the control shaft position sensor, or the VVEL modul… Repairs typically run $600-$3,000. Severity: high.
What is the 2008-2013 Infiniti G37 Timing Chain Stretch and Guide Wear on VQ37VHR?
The VQ37VHR runs three timing chains — a primary and two secondaries — with plastic guides and hydraulic tensioners. The chains stretch and the guides wear, and because the tensioners rely on oil pressure to take up slack, any oil pressure loss or extended change interval acceler… Repairs typically run $1,800-$4,000. Severity: high.
What is the 2008-2011 Infiniti G37 Cam Cover Gasket Leak Causing Low Oil Pressure?
On pre-2012 VQ37VHR engines the cam cover gaskets fail and leak, and unlike an ordinary valve cover weep this one matters mechanically: the leak path bleeds down oil pressure feeding the top end. Low oil pressure on this engine starves the VVEL assembly and the cam and rod bearin… Repairs typically run $400-$1,400. Severity: high.
What is the 2008-2013 Infiniti G37 Oil Gallery Gasket Leak?
The VQ37VHR engine develops oil leaks from the oil gallery gaskets located between the upper and lower oil pans. Oil seeps onto the exhaust, creating a burning smell and potential fire hazard if left unaddressed. Repairs typically run $400-$1,200. Severity: high.
What is the 2008-2013 Infiniti G37 Electronic Steering Lock Failure?
Like the G35, the G37 suffers from electronic steering wheel lock actuator failures that prevent the vehicle from starting. The internal motor in the lock mechanism burns out or the control module loses communication with the BCM. Repairs typically run $300-$1,000. Severity: high.
What is the 2008-2013 Infiniti G37 Concentric Slave Cylinder Failure (Manual)?
Manual transmission G37s suffer from premature concentric slave cylinder (CSC) failure. The internal seal degrades, causing clutch fluid to leak into the bell housing and resulting in a soft or sinking clutch pedal. Repairs typically run $800-$2,000. Severity: high.
What is the 2008-2013 Infiniti G37 Crankshaft Position Sensor Failure Causing Hot Stall and No-Start (P0335)?
The crankshaft position sensor mounted on the transmission bell housing of the VQ37VHR is a documented failure point on G37s past about 80k miles. It typically fails when hot: the engine stalls after warm-up or extended driving, cranks without starting until it cools, then restar… Repairs typically run $80-$350. Severity: high.
What is the 2008-2009 Infiniti G37 Dashboard Melts, Turns Sticky, and Cracks Causing Windshield Glare?
The dashboard topper material degrades under sustained sun and heat, first going soft and tacky, then developing shiny patches, cracks, and chipping — usually starting at the defroster vents and the instrument binnacle. The degraded surface turns reflective and throws glare onto… Repairs typically run $60-$2,500. Severity: medium.
What is the 2008-2010 Infiniti G37 VQ37VHR Excessive Oil Consumption on Early Engines?
Early-production VQ37VHR engines consume noticeably more oil than owners expect, and the 2008-2010 build years are the most affected. The consumption is real rather than imagined leakage, driven by ring and cylinder wear characteristics on early blocks, and it is aggravated by ha… Repairs typically run $100-$3,500. Severity: medium.
What is the 2008-2013 Infiniti G37 Clogged Sunroof Drains Causing Cabin Water Leaks and Electrical Faults?
Water entering the sunroof tray is meant to drain through four tubes routed down the A- and C-pillars. Debris blocks the drain nipples at the tray corners, the tray overflows, and water runs into the headliner and down the pillars into the cabin. Owners report soaked footwell car… Repairs typically run $0-$900. Severity: medium.
What is the 2008-2013 Infiniti G37 6-Speed Manual Synchronizer Wear Causing Grind into 2nd, 5th and 6th Gear?
The FS6R31A 6-speed manual fitted to G37 Sport/6MT cars develops synchro grind, most often on 2nd, 5th and 6th (some report 3rd) during quick upshifts or when skipping gears. It is usually masked when shifting gently and shows up under spirited driving. Early in the car's life In… Repairs typically run $150-$4,500. Severity: medium.
What is the 2008-2013 Infiniti G37 Front Wheel Hub Bearing Failure Causing Speed-Dependent Hum?
Front hub bearings on the G37 (sedan, coupe and especially the heavier AWD G37x) fail well before most owners expect, typically between 50k and 90k miles. The symptom is a hum or drone above roughly 45-50 mph that changes pitch when the car is loaded in one direction (louder turn… Repairs typically run $200-$700. Severity: medium.
What is the 2008-2011 Infiniti G37 Radiator Hose and Plastic Coolant Bleed Fitting Failure Causing Coolant Loss and Overheating?
Early G37s develop coolant leaks from the upper radiator hose assembly and its plastic bleeder/connector fittings, which embrittle with age and heat and can split suddenly. Owners report sudden coolant loss and overheating warnings, dried coolant residue around the thermostat hou… Repairs typically run $100-$500. Severity: medium.
What is the 2008-2013 Infiniti G37 Ignition Coil Blistering and Failure Causing Cylinder Misfire (P0300-P0306)?
The Hitachi coil-on-plug units on the VQ37VHR are a recurring failure item on higher-mileage G37s. Heat and electrical stress cause the coil body to blister or bulge, producing a random or single-cylinder misfire, rough idle and flashing check-engine light. Infiniti's bulletin IT… Repairs typically run $150-$900. Severity: medium.
What is the 2008-2013 Infiniti G37 Power Steering High-Pressure Hose and Hard-Line Leaks?
The hydraulic power steering circuit on the G37 develops leaks at the high-pressure hose, its crimped hard-line sections and the reservoir-side return hose as the rubber ages. Owners describe fluid coating the underside of the car, a whine from the pump when low, and difficulty p… Repairs typically run $150-$700. Severity: medium.
What is the 2008-2009 Infiniti G37 Steering Wheel Trim Coating Peeling and Chipping on 2008-2009 Cars?
Separate from the melting dashboard, the painted/soft-touch coating on the steering wheel spokes and rim of 2008-2009 G37s (and 2007-2008 G35 sedans sharing the wheel) peels and chips, often before 50k miles. A 25-plus-page G35Driver thread and multiple MyG37 threads document own… Repairs typically run $150-$900. Severity: low.
What is the 2008-2013 Infiniti G37 Fuel Level Sending Unit Wear Causing Inaccurate or Stuck Fuel Gauge?
G37 fuel gauges commonly read wrong as the cars age: the needle sticks at half or full, drops suddenly, or the low-fuel light comes on with fuel remaining. The saddle-style tank uses a main and sub level sensor; wear on the float-arm resistor track in either sender produces errat… Repairs typically run $100-$500. Severity: low.
What is the 2008-2013 Infiniti G37 A/C Compressor Shaft-Seal and High-Side Fitting Refrigerant Leaks Causing Warm Air?
Owners across model years report the G37's air conditioning gradually blowing warm as refrigerant escapes, most often from the compressor shaft seal, the high-pressure service fitting or cutoff-switch O-rings, and occasionally the condenser. The system holds only about 1.1 lb of… Repairs typically run $150-$2,800. Severity: low.
What is the 2008-2013 Infiniti G37 Bose Trunk-Mounted Amplifier Failure Causing Total or Intermittent Loss of Audio?
On Bose-equipped G37s the trunk-mounted amplifier is the most common audio failure. Sound cuts out entirely or intermittently with no error on screen—the head unit, navigation and controls keep working, but nothing comes from the speakers. Owner diagnosis on G35Driver and MyG37 s… Repairs typically run $100-$800. Severity: low.
