According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2014-2026 Infiniti Q50 has 11 documented known issues, with 8 rated critical. The most serious are Fuel Pump Control Module Software Causes Engine Stall (Recall 17V476000) ($0-$0 repair), Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000) ($0-$0 repair), ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000) ($0-$0 repair), Improperly Heat-Treated Steering Knuckle and Rear Axle Housing (Recall 21V402000) ($0-$0 repair), Driveshaft Fatigue Fracture Causing Loss of Drive Power (Recall 24V470000) ($0-$0 repair), Accessory Drive Belt Walks Off Pulleys and Shreds (TSB ITB18-012) ($250-$1,200 repair), M274 2.0T Timing Chain and Camshaft Adjuster Wear ($1,500-$3,500 repair) and . at .
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2014-2026 Infiniti Q50 has 11 documented issues. The most frequently reported are: Fuel Pump Control Module Software Causes Engine Stall (Recall 17V476000), Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000), ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000). Of these, 8 are rated critical and should be addressed promptly.
Is the Infiniti Q50 reliable?
The 2014-2026 Infiniti Q50 has 11 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 8 issues are rated critical: Fuel Pump Control Module Software Causes Engine Stall (Recall 17V476000) and Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000) and ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000) and Improperly Heat-Treated Steering Knuckle and Rear Axle Housing (Recall 21V402000) and Driveshaft Fatigue Fracture Causing Loss of Drive Power (Recall 24V470000) and Accessory Drive Belt Walks Off Pulleys and Shreds (TSB ITB18-012) and M274 2.0T Timing Chain and Camshaft Adjuster Wear and VR30DDTT Internal Turbocharger Oil Leak (Emissions Warranty Extension to 10yr/120k). 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 Q50 problems?
Repair costs for known Infiniti Q50 issues range from $0 to $6,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Fuel Pump Control Module Software Causes Engine Stall (Recall 17V476000), typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What year Infiniti Q50 is the most reliable?
Reliability varies across model years of the Infiniti Q50. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2014-2026 Infiniti Q50 with 11 documented issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports.
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.
Filter:
On certain 2021 Q50 and Q60 models the Engine Control Module misreads a rapid acceleration event and responds by incorrectly reducing engine power and cutting fuel supply. The driver experiences an abrupt loss of power, and the fuel cut can be severe enough to stall the engine outright — a dangerous failure mode during exactly the maneuvers where full power was requested, such as merging or overtaking. NHTSA campaign 21V234000 covers the defect; Infiniti's internal number is R20C5 and the recall began May 25, 2021.
Sudden loss of engine power during hard acceleration
Engine stalls while accelerating or merging
Momentary hesitation or cut-out under full throttle
Check engine light after a power loss event
How to Fix
Have an Infiniti dealer reprogram the ECM under recall R20C5 / NHTSA 21V234000, free of charge. This is the whole remedy — no hardware is replaced. Confirm on a used 2021 Q50 that the campaign was completed rather than assuming it, since the symptom is intermittent and a prior owner may never have reported it. If power loss or stalling persists after the reflash, stop attributing it to the recall and have the fuel delivery system and the drive belt checked instead.
Early-production VR30DDTT engines leave the factory with the A/C compressor pulley bracket slightly out of plane with the rest of the accessory drive. The misalignment makes the serpentine belt track toward the edge of the smooth idler pulley, where it frays, walks off, and eventually shreds. Because a single belt drives the water pump, alternator, and A/C compressor, losing it means immediate charging failure and rapid overheating, and the shredded belt can damage the pulleys, alternator, and water pump on its way out. Infiniti issued TSB ITB18-012 covering the alignment inspection and correction procedure. Nissan later revised the lower smooth idler pulley with raised lips to keep the belt captive — the design that shipped on the RZ34 Z.
Belt squeal or chirp, often worse on cold start or under A/C load
Visible fraying on one edge of the serpentine belt
Belt riding off-center on the smooth idler pulley
Battery and temperature warning lights together after the belt departs
Rapid overheating and loss of power steering assist
How to Fix
Inspect the belt at every oil change for fraying on either edge and check that it runs centered on the smooth idler. If it is tracking off, have the shop perform the ITB18-012 alignment procedure rather than just fitting a new belt — a fresh belt on a misaligned bracket fails again. Replace the smooth idler with the revised lipped-flange pulley (the later Z-spec part) or fit an aftermarket anti-jump pulley kit, and replace the tensioner at the same time if it shows play or rough bearing feel. Carry the belt failure seriously: if the belt goes while driving, stop as soon as it is safe rather than continuing on a dead water pump.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Z1 Q50/Q60 VR30 anti-jump belt upgrade kit
OEMZ1 assembled VR30 anti-jump kit
Revised lipped-idler and new-belt branch after alignment is measured/corrected Fitment/availability: Fits listed 2016-2021 Q50 VR30DDTT and includes the revised smooth lower idler plus selectable belt. Confirm engine and belt option; it …
Confirmed grooved-idler wear branch Fitment/availability: Fits 2016-2024 Q50 3.0L VR30. This is the grooved idler and is not interchangeable by description with the smooth/lipped lower pulley; replace it only if its bearing, surface or r…
Confirmed rough, loose or weak-tensioner branch Fitment/availability: For VR30DDTT Q50/Q60 applications; replace only when inspection shows roughness, play, damage or inadequate tension.
The Q50's 2.0t uses the Mercedes-Benz M274 turbocharged four, shared with the C300 and GLC300. The timing chain and the camshaft adjusters (variable valve timing phasers) wear faster than the engine's design life, with problems commonly surfacing somewhere around 80,000 miles and reported as early as 60,000 on neglected cars. The first symptom is a brief metallic rattle on cold start as oil pressure builds and the tensioner takes up slack. Left alone, chain stretch throws off cam timing, sets correlation codes, and in the worst cases the chain skips teeth or breaks, which on this interference engine destroys valves and pistons. Extended oil change intervals and low oil level accelerate the wear.
Metallic rattle for one to three seconds on cold start
Rattle or whine from the front of the engine that changes with RPM
Check engine light with camshaft/crankshaft correlation codes
Rough idle or reduced power
Engine misfire or failure to start after a loud bang
How to Fix
Treat a cold-start rattle on the 2.0t as a timing issue until proven otherwise rather than dismissing it as normal direct-injection noise. Have the shop scan for camshaft/crankshaft correlation codes and check actual cam timing against spec. Caught early, replacing the chain, tensioner, guides, and both camshaft adjusters is far cheaper than the engine. Change oil every 5,000 miles with the correct low-ash full synthetic instead of following the extended factory interval, and check the level between changes — this engine also consumes oil, and running it low is what kills the chain. On a used purchase, cold-start the car yourself before buying; a seller who has the engine already warm may be hiding exactly this noise.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Infiniti M274 primary timing chain
OEM13028-HG00F
Measured chain-wear/stretch branch Fitment/availability: 13028-HG00F supersedes 13028-HG00C and 13028-90C0N and fits listed Q50 2LTURBO applications. Confirm 2016-2018 U.S.
Confirmed primary chain-tensioner/adjuster failure branch Fitment/availability: 13070-HG00F fits listed Q50 2LTURBO applications and is cataloged as the chain tensioner/tensioner adjuster. Confirm VIN and test result; do not confuse it w…
Worn or damaged slack-side guide branch during confirmed timing service Fitment/availability: 13091-HG00B fits listed Q50 2LTURBO applications and is the slack-side/at-cylinder-head guide. Confirm VIN and diagram position; it is not the …
Worn or damaged lower tension-side guide branch during confirmed timing service Fitment/availability: 13085-HG00B fits listed Q50 2LTURBO applications and is the lower tension-side guide. Confirm VIN and diagram position; the catalog als…
The turbocharger center bearing on the 3.0L twin-turbo VR30DDTT can wear prematurely and let engine oil leak internally past the bearing seals into the exhaust and intake tracts. Oil burning in the exhaust produces heavy white or blue smoke, fouls the catalyst, and trips the MIL. In severe cases the turbo loses boost control and the internal components come apart, which can send debris downstream. Infiniti acknowledged the defect with a turbocharger emission warranty extension covering 2016-2018 Q50 and 2017-2018 Q60, extending coverage on the turbocharger assembly to Full Useful Life — 10 years or 120,000 miles, whichever comes first — when the failure presents as white smoke or an oil leak with a MIL-on condition.
Heavy white or blue smoke from the exhaust, especially after idling then accelerating
Check engine light with boost or manifold pressure codes
Rising oil consumption between changes
Loss of engine power or reduced boost
Whistling or siren-like noise from the turbochargers
How to Fix
If the car is within 10 years / 120,000 miles, take it to an Infiniti dealer and specifically reference the turbocharger emission warranty extension (bulletin MC-11014069) rather than accepting a customer-pay quote. The dealer diagnoses per the bulletin and replaces the affected turbocharger assembly at no charge when the criteria are met. Outside the extension, both turbos are typically replaced together along with the oil feed and drain lines; budget for the catalytic converter as well if the car ran with heavy smoke for a long period. Do not dismiss persistent P0106 on this engine as a simple MAP sensor — Infiniti's own bulletins tie it to turbocharger failure. Frequent oil changes with the correct 0W-20 and letting the engine idle briefly before shutdown after hard driving reduce bearing coking.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Out-of-coverage confirmed failed-turbo branch for 300-hp Q50 Fitment/availability: For a VR30 Q50 with the 300-hp package only. Select driver/LH 14411-5CA7D family or passenger/RH 14411-5CA7C family after diagnosis and provide VIN to con…
Out-of-coverage confirmed failed-turbo branch for 400-hp/Red Sport Q50 Fitment/availability: For the 400-hp package/Red Sport VR30 application only. Select the diagnosed side from the 14411-5CA6D and 14411-5CA6C current families and veri…
OEM Infiniti Q50/Q60 VR30 turbo service gasket kit
OEMZ1 39362 assembled OEM seal kit
Required disturbed oil/coolant/inlet/outlet seal branch during confirmed turbo service Fitment/availability: Exact kit for 2016+ Q50 3.0t and 2017+ Q60 3.0t VR30DDTT.
The M274 four-cylinder in the 2.0t burns noticeably more oil than owners expect, and consumption climbs with mileage. Reports commonly describe roughly a quart per 3,000 miles once the car passes 60,000 miles, with worse cases burning a quart every 1,500 miles. The usual contributors are piston ring wear and coking, valve stem seal hardening, and the crankcase ventilation system pulling oil vapor into the intake. Because the Q50 has no oil dipstick on this engine — the level is read through the instrument cluster — owners often do not notice the loss until the low-oil warning appears, and running the engine chronically low is what turns oil consumption into timing chain and bearing damage.
Low oil level warning between scheduled oil changes
Consumption of a quart or more every 1,500 to 3,000 miles
Blue smoke on startup or under hard acceleration
Oil smell from the engine bay
Fouled spark plugs or misfires at higher mileage
How to Fix
Check the oil level through the vehicle information display at every other fuel fill rather than waiting for a warning, and keep a quart of the correct spec oil in the trunk. Establish the real consumption rate over a measured interval before authorizing repairs. If consumption exceeds roughly a quart per 1,000 miles, have the shop check crankcase pressure and inspect the PCV/crankcase pressure regulator in the cam cover — a failed diaphragm there is the cheapest cause and often sets a crankcase pressure code. Persistent blue smoke on startup after sitting points to valve stem seals; smoke under sustained load points to rings. Shortening the oil change interval to 5,000 miles with full synthetic slows ring coking. Expect the shop to also clean carbon from the intake valves on a direct-injected engine at this mileage.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Confirmed crankcase-ventilation/oil-separator failure branch Fitment/availability: 11830-HG00C is cataloged for Q50 2LTURBO and superseded by current 130G5-90C2N, which the official store describes as the oil-separator assembly including…
The front passenger seat's Occupant Classification System weighs and classifies the occupant to decide whether the passenger frontal airbag should be armed. On affected Q50 sedans the OCS can misclassify a normally seated adult as a child, or read the seat as empty while someone is sitting in it, and switch the passenger airbag off. The passenger airbag status light on the console reads OFF with an adult belted in. In a crash the passenger frontal airbag will not deploy. NHTSA campaign 16V244000 covers 2014-2017 Q50 and 2014-2016 Q50 Hybrid among a large group of Nissan and Infiniti vehicles.
Common Symptoms
Passenger airbag status light reads OFF with an adult in the seat
Airbag status flickers between ON and OFF over bumps
Airbag warning light illuminated on the instrument cluster
Seat reads as occupied when empty
How to Fix
Watch the passenger airbag status indicator every time an adult rides in the front passenger seat. If it reads OFF with an adult seated normally, get the car to an Infiniti dealer — on Q50 the remedy under 16V244000 is replacement of the OCS ECU (not just a reflash as on some other models in the campaign), free of charge. Do not attempt to work around it by adding weight to the seat or unplugging the sensor mat: that defeats the crash logic in both directions. Aftermarket seat covers and hard objects stored under the passenger seat can also confuse the sensor mat, so remove those before concluding the ECU has failed.
A software error in the audio/video control unit can deactivate the display screen, so no rear-view image appears when the car is shifted into reverse. The vehicle fails to comply with FMVSS 111, the federal rear visibility standard. Because the same control unit drives the center display, owners typically see the whole InTouch screen go dark or unresponsive rather than the camera alone failing. NHTSA campaign 21V599000 covers 2021 Q50, Q60, and QX80; Nissan's internal number is R21A9 and letters were mailed September 14, 2021.
Common Symptoms
Black screen when shifting into reverse
Center display goes dark or unresponsive at random
Rear camera image appears delayed, frozen, or distorted
Display returns after an ignition cycle then fails again
How to Fix
Have the dealer update the audio/video control unit software under recall R21A9 / NHTSA 21V599000, free of charge. Before assuming a hardware fault, try a system reset by holding the audio power knob for several seconds — but a reset that has to be repeated means the recall software is the real fix. If the screen still blanks after the update, have the 12V battery and charging system load-tested: marginal system voltage causes the same control unit to drop out and produces a long tail of unrelated-looking InTouch and driver-assist faults.
Q50 sedans with the 2.0L turbo four use a saddle-shaped fuel tank with a transfer system that moves fuel between the two lobes. Incorrect Fuel Pump Control Module software allows the main tank lobe to run too low to feed the engine even though usable fuel remains on the other side and the gauge still shows fuel available. The result is an engine stall while driving, typically at lower indicated fuel levels. NHTSA campaign 17V476000 covers 2016-2018 Q50 and 2017 Q60 with the 2.0L engine; the recall began August 29, 2017.
Engine stalls while driving with fuel still showing on the gauge
Stalling occurs mainly at low indicated fuel level
Hesitation, surging, or loss of power before the stall
Restart succeeds after the car sits or after adding fuel
How to Fix
Have an Infiniti dealer reprogram the Fuel Pump Control Module with the corrected software under recall 17V476000 — free of charge, no mileage limit. Verify the campaign was actually performed on a used purchase rather than assuming it was; the fix is a software flash and takes under an hour. Until then, refuel before the gauge drops below roughly a quarter tank. If the car has already been reprogrammed and still stalls at low fuel, the fault is more likely a failing in-tank transfer/jet pump or the level sender, not the FPCM software.
A batch of front steering knuckles and rear axle housings left the supplier without proper heat treatment, leaving them below the required strength. The weakened parts can deform on impact — a curb strike or pothole that a sound component would shrug off — resulting in loss of steering control or, in the worst case, wheel separation. NHTSA campaign 21V402000 covers certain 2021 Q50 along with 2020 Murano and QX60, 2021 GT-R and QX50. Owner notification letters were mailed July 26, 2021.
Common Symptoms
Steering pull or off-center wheel that alignment does not correct
Uneven or rapid tire wear at one corner
Clunk or knock from a corner over bumps
Visible wheel camber change after an impact
How to Fix
Have the dealer inspect the front steering knuckles and rear axle housing under recall 21V402000 and replace whatever fails inspection, free of charge. Do not skip this one on the theory that the car has never been hit: the parts are under-strength from new, and the failure only reveals itself at the moment of impact. If the car has already struck a curb or pothole hard, describe that to the service advisor — it changes the inspection from precautionary to urgent. Symptoms of an already-deformed knuckle include a steering pull that alignment will not correct and uneven tire wear on one corner.
On rear-wheel-drive Q50 sedans the two-piece propeller shaft can develop fatigue cracks and fracture in service. When the shaft breaks the car loses all drive power without warning, and because the parking pawl in the transmission is no longer connected to the rear wheels the vehicle can roll away when shifted to Park unless the parking brake is set. NHTSA campaign 24V470000 covers 2014-2018 Q50 two-wheel-drive vehicles along with several related M and Q70 models; Infiniti's internal campaign numbers are R24A5 and R24A7. Owner notification letters were mailed August 13, 2024. AWD cars are not covered by this campaign.
Common Symptoms
Sudden total loss of drive power while the engine still runs
Loud bang or grinding from under the center of the car
Driveline vibration or clunk that changes with throttle load
Vehicle rolls when placed in Park without the parking brake applied
How to Fix
Check the VIN against Infiniti's recall lookup or NHTSA. If the car is covered, the dealer replaces the driveshaft free of charge under campaign R24A5/R24A7 with no mileage or age limit. Until the recall work is done, always set the parking brake before leaving the car in Park. A driveline vibration or clunk that changes with load, or a rhythmic thump that rises with road speed, warrants immediate inspection of the shaft and its center support bearing rather than waiting for the recall appointment.
The dual-screen InTouch infotainment system suffers from significant lag, freezing, and occasional black screens. The system uses an outdated processor that struggles with modern navigation and connectivity demands.
Perform a system reset by holding the power button for 10 seconds. Update to the latest firmware via USB. In persistent cases, the infotainment module may need replacement. Some owners have had success with aftermarket head units.
What is the 2016-2018 Infiniti Q50 Fuel Pump Control Module Software Causes Engine Stall (Recall 17V476000)?
Q50 sedans with the 2.0L turbo four use a saddle-shaped fuel tank with a transfer system that moves fuel between the two lobes. Incorrect Fuel Pump Control Module software allows the main tank lobe to run too low to feed the engine even though usable fuel remains on the other sid… Repairs typically run $0-$0. Severity: high.
What is the 2014-2017 Infiniti Q50 Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000)?
The front passenger seat's Occupant Classification System weighs and classifies the occupant to decide whether the passenger frontal airbag should be armed. On affected Q50 sedans the OCS can misclassify a normally seated adult as a child, or read the seat as empty while someone… Repairs typically run $0-$0. Severity: high.
What is the 2021 Infiniti Q50 ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000)?
On certain 2021 Q50 and Q60 models the Engine Control Module misreads a rapid acceleration event and responds by incorrectly reducing engine power and cutting fuel supply. The driver experiences an abrupt loss of power, and the fuel cut can be severe enough to stall the engine ou… Repairs typically run $0-$0. Severity: high.
What is the 2021 Infiniti Q50 Improperly Heat-Treated Steering Knuckle and Rear Axle Housing (Recall 21V402000)?
A batch of front steering knuckles and rear axle housings left the supplier without proper heat treatment, leaving them below the required strength. The weakened parts can deform on impact — a curb strike or pothole that a sound component would shrug off — resulting in loss of st… Repairs typically run $0-$0. Severity: high.
What is the 2014-2018 Infiniti Q50 Driveshaft Fatigue Fracture Causing Loss of Drive Power (Recall 24V470000)?
On rear-wheel-drive Q50 sedans the two-piece propeller shaft can develop fatigue cracks and fracture in service. When the shaft breaks the car loses all drive power without warning, and because the parking pawl in the transmission is no longer connected to the rear wheels the veh… Repairs typically run $0-$0. Severity: high.
What is the 2016-2019 Infiniti Q50 Accessory Drive Belt Walks Off Pulleys and Shreds (TSB ITB18-012)?
Early-production VR30DDTT engines leave the factory with the A/C compressor pulley bracket slightly out of plane with the rest of the accessory drive. The misalignment makes the serpentine belt track toward the edge of the smooth idler pulley, where it frays, walks off, and event… Repairs typically run $250-$1,200. Severity: high.
What is the 2014-2018 Infiniti Q50 M274 2.0T Timing Chain and Camshaft Adjuster Wear?
The Q50's 2.0t uses the Mercedes-Benz M274 turbocharged four, shared with the C300 and GLC300. The timing chain and the camshaft adjusters (variable valve timing phasers) wear faster than the engine's design life, with problems commonly surfacing somewhere around 80,000 miles and… Repairs typically run $1,500-$3,500. Severity: high.
What is the 2016-2018 Infiniti Q50 VR30DDTT Internal Turbocharger Oil Leak (Emissions Warranty Extension to 10yr/120k)?
The turbocharger center bearing on the 3.0L twin-turbo VR30DDTT can wear prematurely and let engine oil leak internally past the bearing seals into the exhaust and intake tracts. Oil burning in the exhaust produces heavy white or blue smoke, fouls the catalyst, and trips the MIL. Repairs typically run $0-$6,500. Severity: high.
What is the 2021 Infiniti Q50 Rear-View Camera Image Fails to Display (Recall 21V599000)?
A software error in the audio/video control unit can deactivate the display screen, so no rear-view image appears when the car is shifted into reverse. The vehicle fails to comply with FMVSS 111, the federal rear visibility standard. Because the same control unit drives the cente… Repairs typically run $0-$0. Severity: medium.
What is the 2014-2018 Infiniti Q50 M274 2.0T Excessive Oil Consumption?
The M274 four-cylinder in the 2.0t burns noticeably more oil than owners expect, and consumption climbs with mileage. Reports commonly describe roughly a quart per 3,000 miles once the car passes 60,000 miles, with worse cases burning a quart every 1,500 miles. The usual contribu… Repairs typically run $200-$4,000. Severity: medium.
What is the 2014-2026 Infiniti Q50 InTouch Infotainment System Lag and Freezing?
The dual-screen InTouch infotainment system suffers from significant lag, freezing, and occasional black screens. The system uses an outdated processor that struggles with modern navigation and connectivity demands. Repairs typically run $0-$1,500. Severity: medium.
