Audi · Known Issues

2014 Audi Q7 Problems: 9 Issues Every Owner Should Know

2014 model year · 3,350+ owner reports · Updated June 2026

According to Au7o's analysis of 3,350+ owner reports, the 2014 Audi Q7 has 9 documented known issues, with 7 rated critical. The most serious are Air Suspension System Failure (Compressor and Springs) ($1,200-$5,000 repair), Water Pump and Thermostat Failure (Overheating) ($800-$5,000 repair), TDI Oil Cooler Leak into Brake Booster (Safety Recall) ($0-$0 repair), Supercharger Bearing Failure and Boost Leaks (3.0T) ($150-$5,000 repair), Timing Chain Tensioner Failure (Catastrophic Engine Damage) ($2,000-$18,000 repair), TDI Diesel Emissions Scandal and Recalls (Dieselgate) ($0-$3,000 repair) and Severe Carbon Buildup Causing Valve Damage (3.0T TFSI) ($300-$20,000 repair). The most commonly reported issue is Air Suspension System Failure (Compressor and Springs) with 2,500 owner reports. Across all issues, repair costs range from $150 to $20,000. DIY maintenance guides at au7o.io.

All 9 Known Issues

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On the 2007-2015 Audi Q7, the 2007-2015 Audi Q7 (3.0T, 3.6L, TDI) experiences water pump and thermostat failures causing engine overheating. Plastic impeller water pumps fail from debris clogging or electronic failures. When pump fails, coolant flow drops causing rapid overheating and severe engine damage (warped cylinder heads, blown gaskets). Thermostat housings crack and leak coolant. Failure often occurs around 60k-80k miles. Preventive replacement recommended.

This issue also affects: Audi A4 allroad, Audi Q5, Audi S3

Common Symptoms

Engine temperature gauge rising into red
Coolant warning light
Coolant leaking under vehicle
Steam or smoke from engine bay
Check engine light with cooling system codes
Heater not blowing hot air
Overheating

How to Fix

IMMEDIATE if overheating: Pull over, turn off engine, DO NOT continue - engine damage occurs in minutes. Preventive: Replace water pump/thermostat assembly at 60k-80k miles ($800-1,500) to avoid catastrophic failure. Failed pump: Replace water pump/thermostat ($800-1,500). If overheated: Cylinder head inspection, possible head gasket replacement ($2,500-5,000). Use OEM Audi or premium Geba/Meyle parts.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

UpgradeFor 3.0T Q7: OEM water pump 06E121018F (latest revision, supersedes 06E121016C/G/Q/018N). HEPU 06E121018D is a quality aftermarket alternative with metal impeller. (HEPU #06E121018D)
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UpgradeGerman Performance Solutions (GPS) billet aluminum thermostat housing eliminates the OEM plastic housing cracking issue. $234.99 with 3-year warranty. Highly rated on Audizine. (German Performance Solutions Billet Aluminum Thermostat Housing)
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TipReplace water pump, thermostat, and all seals together. Also replace heater pipe O-ring (N90365302). Labor is significant on Q7 - do everything at once to avoid repeat access.
NoteOEM plastic thermostat housing tabs break, causing sudden thermostat failure and overheating. The GPS billet housing is the definitive fix to prevent repeat failures.

Typical repair cost:$800 - $5,000

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On the 2007-2015 Audi Q7, the 2007-2015 Audi Q7 (3.0T and 3.6L) experiences timing chain tensioner failures causing catastrophic engine damage. The tensioner wears prematurely, allowing the timing chain to skip or break, bending valves and destroying pistons. Metal debris contaminates engine oil. Symptoms include rattling/ticking on cold start. Failure often occurs between 80k-120k miles. Complete engine loosening can lead to five-figure repair costs. Irregular oil changes significantly accelerate wear since tensioners work hydraulically and depend on clean oil. Preventive replacement at 80k-90k miles recommended.

This issue also affects: Audi A4, Audi A5, Audi A6

Common Symptoms

Rattling or ticking noise on cold start
Metal grinding noise from timing chain area
Check engine light with camshaft codes
Rough idle or misfires
Complete engine failure (sudden loss of power)
Engine won't start (timing jumped)
Metallic debris in oil

How to Fix

PREVENTIVE REPLACEMENT: Replace timing chain tensioners at 80k-90k miles ($2,000-3,500) to avoid catastrophic failure. If rattling present: Stop driving immediately - chain may jump at any moment. Failed tensioner: Full timing chain service including tensioners, guides, and chain ($2,500-4,500). If engine damaged: Complete engine rebuild or replacement ($10,000-18,000). AudiWorld forum consensus: Don't skip this preventive maintenance on 3.0T/3.6L engines.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

UpgradeFor 3.0 TDI Q7: complete timing chain kit from FCP Euro (059109229AAKT) includes 206-link chain, 136-link chain, 6 guide rails, and tensioner. Most comprehensive kit available. (Genuine VW/Audi #059109229AAKT)
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UpgradeFor 3.0T supercharged Q7: upper timing chain tensioners 06E109218AP (right) and 06E109217H (left). ECS Tuning carries complete kits. (Genuine VW/Audi #06E109218AP)
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TipReplace preventatively at 80,000-120,000 miles. Cold-start rattle is the early warning. The Q7 timing chain is at the rear of the engine, requiring 12-18 hours of labor.
NoteIf chain has already jumped 4-5 teeth, head damage may be avoidable if caught immediately. More teeth skipped = certain engine damage. Do NOT attempt to start engine if chain has jumped.

Typical repair cost:$2,000 - $18,000

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On the 2011-2023 Audi Q7, the 2011-2023 Audi Q7 3.0T TFSI direct injection engine suffers severe carbon buildup on intake valves, secondary air ports, and intake manifold. Direct injection means no fuel washes over valves, allowing oil vapor to accumulate. Carbon buildup causes rough idle after cold start (~100k km), misfires, increased oil consumption, and in severe cases, VALVE DAMAGE requiring engine replacement. AudiWorld reports dealers finding damaged valves from carbon buildup so severe the engine needed replacement. Walnut blasting required every 60k-80k miles.

This issue also affects: Acura MDX, Acura TL, Audi S4

Common Symptoms

Rough idle after cold start (smooths out when warm)
Misfires (especially cold engine)
Loss of power
Increased oil consumption
Check engine light (secondary air insufficient flow)
Poor fuel economy
Engine damaged (severe cases)

How to Fix

Walnut shell blasting: Remove intake manifold and supercharger, blast intake valves/ports with walnut shells ($800-1,500 for 3.0T). Secondary air port cleaning: Clean carbon from secondary air ports ($300-600). Preventive: Install catch can ($300-500), replace PCV system every 60k-80k miles ($200-400), use top-tier gas. Clean valves every 60k-80k miles. Severe valve damage: Engine replacement ($12,000-20,000).

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipWalnut blasting every 50,000-70,000 miles is the gold standard for Q7 3.0T. Professional service recommended due to engine bay complexity. Budget $800-$1,500.
UpgradeMishimoto Universal Baffled Catch Can (MMBCC-UNI-BK) with custom brackets for prevention. No direct-fit catch can exists for 4L Q7 3.0T platform. (Mishimoto #MMBCC-UNI-BK)
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TipSeafoam through IAT port every 5,000-10,000 miles as preventive maintenance helps slow accumulation but will NOT remove established deposits.
NoteSevere carbon buildup on 3.0T Q7 can cause valve damage if deposits prevent proper valve closure. Address misfires and rough idle promptly.

Typical repair cost:$300 - $20,000

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On the 2013-2015 Audi Q7 3.0L TDI, the 2013-2015 Audi Q7 3.0L TDI has a serious defect where the check valve in the vacuum line becomes contaminated with plastic debris, allowing engine oil to leak into the brake booster. If oil leaks into the brake booster, the diaphragm ruptures causing LOSS OF POWER BRAKING ASSIST. This drastically increases stopping distance and creates a serious safety hazard. Audi issued NHTSA recall - dealers replace vacuum line and inspect/replace brake booster components.

Common Symptoms

Hard brake pedal (increased effort required)
Loss of power braking assist
Increased stopping distance
Oil smell in cabin
Brake warning light
Oil residue in brake booster area

How to Fix

This is a SAFETY RECALL - contact Audi dealer immediately for FREE vacuum line replacement and brake booster inspection/repair. Repair includes: Replace vacuum line with improved check valve, inspect brake booster for oil contamination, replace brake booster if contaminated ($800-1,500 value - FREE under recall). Do NOT delay - loss of brake assist is extremely dangerous.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

NoteCRITICAL SAFETY RECALL: Oil cooler can leak oil into the brake booster vacuum line, causing loss of brake assist. Contact dealer immediately for free repair.
TipAffects 2013-2015 Q7 TDI models. Check VIN at NHTSA.gov. Dealer repairs the oil cooler seal and inspects the brake booster at no cost.
NoteIf brake pedal feels hard/high with poor stopping power, the brake booster may already be contaminated. Stop driving and tow to dealer immediately.
UpgradeBlueDriver Bluetooth OBD-II scanner — professional diagnostics from your phone (BlueDriver Bluetooth OBD-II Scanner)
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UpgradeHaynes repair manual — step-by-step procedures for your vehicle (Haynes Repair Manual)
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Typical repair cost:$0 - $0

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On the 2011-2015 Audi Q7 3.0T, the 2011-2015 Audi Q7 3.0T supercharged engine experiences supercharger bearing failures, bypass valve failures, and boost leaks. Worn supercharger bearings cause whining noise, power loss, and complete supercharger failure. Bypass valves fail causing boost lag and poor acceleration. Boost leaks in hoses/lines cause check engine lights and reduced power. Supercharger rebuild: $1,500-2,500. New supercharger: $3,000-5,000.

This issue also affects: Audi A5, Audi A6 allroad, Audi A7

Common Symptoms

Whining or whistling noise from engine (especially under acceleration)
Loss of power or boost
Poor acceleration or turbo lag
Check engine light with boost/supercharger codes
Hissing sound (boost leak)
Rough idle
Reduced fuel economy

How to Fix

Worn bearings: Supercharger rebuild with new bearings ($1,500-2,500) or replacement supercharger ($3,000-5,000). Bypass valve: Replace supercharger bypass valve ($300-600). Boost leaks: Inspect all boost hoses/clamps, replace cracked hoses ($150-400). Use OEM Audi or quality aftermarket (INA) supercharger bearings. AudiWorld recommends catch can installation ($300-500) to reduce oil vapor damage to supercharger.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

UpgradeJHM Motorsports complete seal & gasket kit with new pocket bearings and supercharger oil. Fits 4L Q7 3.0T alongside B8 S4/S5 and C6/C7 A6/A7. (JHM Motorsports Supercharger Seal & Gasket Kit (Q7 3.0T))
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UpgradeJon Bond Performance full TVS1320 rebuild kit with INA rear needle bearings, Permatex gasket maker, and JB Performance supercharger oil. (Jon Bond Performance TVS1320 Full Rebuild Kit)
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TipSupercharger rebuild ($800-$1,500) vs OEM replacement ($3,000-$5,000). Professional rebuild services from Superchargers Online (818-518-9889) or Jokerz Performance.
NoteWhining that increases with RPM = bearing failure. Address promptly before rotor contact destroys internals, requiring full replacement instead of rebuild.

Typical repair cost:$150 - $5,000

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On the 2009-2016 Audi Q7, the 2009-2016 Audi Q7 3.0L TDI diesel was part of Volkswagen Group's emissions cheating scandal. EPA found VW/Audi failed to comply with Clean Air Act regulations - vehicles emitted up to 40x legal NOx emissions. Audi issued emissions recalls for 2009-2012 Q7 TDI (Gen 1 fix) and 2013-2016 Q7 TDI (Gen 2 fix). Some owners report reduced performance, increased DEF consumption, and DPF issues after emissions fix. Class action settlements provided compensation to affected owners.

This issue also affects: Chevrolet Silverado 3500HD, Citroen Berlingo, Citroen C4

Common Symptoms

Check engine light (after emissions fix)
Reduced power or performance (post-fix)
Increased DEF (diesel exhaust fluid) consumption
DPF (diesel particulate filter) regeneration issues
EGR (exhaust gas recirculation) problems
Poor fuel economy (post-fix)

How to Fix

Emissions recall: Contact Audi dealer for FREE emissions modification/repair (mandatory for registration in some states). Post-fix issues: EGR cooler cleaning/replacement ($800-1,500), DPF cleaning/replacement ($1,500-3,000), DEF system repairs ($300-1,200). Class action settlement: Eligible owners received compensation ($7,000-10,000 depending on model year). Check settlement status at VWCourtSettlement.com. Some emissions repairs covered under extended warranty.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipCheck with your Audi dealer for buyback eligibility or emissions fix status. Extended diesel emissions warranty may cover certain repairs for 10 years/120,000 miles.
NoteThe emissions "fix" software update has been reported to affect fuel economy and performance negatively by some owners. Research before accepting the fix.
TipIf you accepted the buyback/settlement, ensure all payments were received. Contact the settlement administrator if any payments are outstanding.
TipExtended emissions warranty covers SCR catalyst, NOx sensors, AdBlue/DEF system, and EGR components. Verify coverage with your VIN at the Audi dealer.
UpgradeBlueDriver Bluetooth OBD-II scanner — professional diagnostics from your phone (BlueDriver Bluetooth OBD-II Scanner)
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UpgradeHaynes repair manual — step-by-step procedures for your vehicle (Haynes Repair Manual)
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Typical repair cost:$0 - $3,000

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2,500 owners

On the 2007-2015 Audi Q7, the 4L Q7 air suspension is the most failure-prone system on the vehicle. The heavy SUV stresses air springs to their limits, causing rubber bellows to crack and leak. The compressor overworks to compensate and burns out its motor. The valve block can also stick, sending air to the wrong corner. Failures typically cascade - one leaking spring kills the compressor within months.

This issue also affects: Audi A5, Audi A6 allroad, Audi A7

Common Symptoms

Vehicle sags overnight on one or more corners
Compressor runs continuously at startup
Suspension fault warning on dash
Vehicle sits at uneven height
Ride becomes harsh or bouncy
Compressor is very loud
Vehicle will not raise from loading height
Air suspension offline message

How to Fix

Replace all four air springs and the compressor as a complete system overhaul for best results. If budget is limited, replace the leaking spring(s) and compressor together. Always replace the compressor relay. Arnott aftermarket air springs are popular and cost 50-60% less than OEM. Some owners convert to coilover suspension ($2,000-$3,000) to eliminate the air system entirely.

What Owners Are Using

Parts and tips from 2,500+ owners who fixed this issue

UpgradeArnott air springs for the 4L Q7 are the best aftermarket option. Lifetime warranty and OE fit. Replace in pairs (both fronts or both rears) at minimum. (Arnott #A-2870)
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TipConsider coilover conversion if multiple components have failed. Bilstein B4 or Koni FSD with Eibach springs eliminates the air suspension entirely for $2,000-$3,000 installed. No more compressor, valve block, or air spring failures.

Typical repair cost:$1,200 - $5,000

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High Confidence2,500 reportsLast reported by owners Sep 2023Reviewed Mar 2026

On the 2007-2015 Audi Q7, the 2007-2015 Audi Q7 with adaptive air suspension experiences air strut leaks and compressor failures. Air struts leak due to seal degradation, physical damage, corrosion, or wear. Leaking struts cause suspension to sag, uneven ride height, and instability. Compressor fails from overwork (cycling constantly due to leaks) or electronic module failures. Symptoms include sagging corners, compressor running constantly, suspension warning lights, and harsh ride. Air strut replacement: $800-1,500 per corner. Compressor: $1,200-2,000.

Common Symptoms

Vehicle sagging on one or more corners
Uneven ride height
Suspension warning light
Compressor running constantly (loud motor noise)
Harsh or bouncy ride
Air suspension fault message
Compressor won't activate (complete failure)

How to Fix

Leaking strut: Replace air strut ($800-1,500 per corner). All four corners worn: Replace all four struts ($3,000-5,500). Failed compressor: Replace air suspension compressor ($1,200-2,000). Control module fault: Replace suspension control module ($800-1,500). Alternative: Convert to coil spring suspension ($1,500-2,500 all corners) - eliminates air suspension issues permanently. AudiWorld recommends Arnott or Strutmasters air struts (cheaper than OEM, good quality).

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

UpgradeArnott Industries remanufactured air struts offer 40-60% savings over OEM with 2-year warranty. Arnott is the industry leader in aftermarket air suspension components. (Arnott Industries Remanufactured Air Strut (Q7))
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UpgradeAir compressor with relay and dryer. Always replace the dryer with the compressor - a clogged dryer is the #1 cause of premature compressor failure. (Arnott Industries Air Compressor Assembly)
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TipReplace air struts in pairs (both fronts or both rears). Single strut replacement causes uneven wear and overworks the compressor, leading to premature failure.
NoteConstant compressor running or overnight sag indicates air leak. Address immediately before the compressor burns out ($1,000-$2,000 replacement).

Typical repair cost:$800 - $5,500

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Community Reported

850 owners

On the 2007-2019 Audi Q7, the Q7 Torsen-based quattro transfer case develops seal leaks and internal wear, particularly at higher mileages. The transfer case output shaft seals are the most common leak point. If fluid level drops too low, the transfer case bearings and gears can be damaged, leading to grinding noises and eventual failure. The 4L Q7 is more susceptible due to its heavier curb weight.

This issue also affects: Alfa Romeo Stelvio, Audi A5, Audi A6 allroad

Common Symptoms

Fluid leak from center of vehicle under transfer case
Grinding or whining noise from undercarriage
Vibration at highway speeds that changes with speed
Clunking when shifting from reverse to drive
AWD malfunction warning
Differential fluid on garage floor
Difficulty engaging low range (if equipped)

How to Fix

Replace leaking seals and refill with correct fluid (75W-90 GL-5 or Audi specification). If grinding is present, the transfer case may need rebuild or replacement. Regular fluid changes every 60,000 miles can prevent internal damage. Check for leaks at every oil change.

What Owners Are Using

Parts and tips from 850+ owners who fixed this issue

TipChange transfer case fluid every 60,000 miles even though Audi says lifetime fill. Use 75W-90 GL-5 synthetic (Liqui Moly or Motul). This is cheap insurance ($30 in fluid) against a $3,000 transfer case replacement.
NoteIf you see a puddle in the center of the vehicle, check the transfer case fluid level immediately. Driving with low fluid causes rapid bearing damage. Top off and schedule seal replacement.
UpgradeTransfer case fluid for proper lubrication of the AWD/4WD system (GM Transfer Case Fluid)
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UpgradeTransfer case encoder motor for shift-on-the-fly 4WD systems (Dorman Transfer Case Encoder Motor)
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Typical repair cost:$300 - $3,500

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High Confidence850 reportsLast reported by owners Jun 2023Reviewed Mar 2026

Frequently Asked Questions

What are the most common Audi Q7 problems?

According to Au7o's analysis of 3,350+ owner reports, the 2014-2014 Audi Q7 has 9 documented issues. The most frequently reported are: Air Suspension System Failure (Compressor and Springs), Water Pump and Thermostat Failure (Overheating), TDI Oil Cooler Leak into Brake Booster (Safety Recall). Of these, 7 are rated critical and should be addressed promptly.

Is the Audi Q7 reliable?

The 2014-2014 Audi Q7 has 9 known issues documented across 3,350+ owner reports. 7 issues are rated critical: Air Suspension System Failure (Compressor and Springs) and Water Pump and Thermostat Failure (Overheating) and TDI Oil Cooler Leak into Brake Booster (Safety Recall) and Supercharger Bearing Failure and Boost Leaks (3.0T) and Timing Chain Tensioner Failure (Catastrophic Engine Damage) and TDI Diesel Emissions Scandal and Recalls (Dieselgate) and Severe Carbon Buildup Causing Valve Damage (3.0T TFSI). 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 Audi Q7 problems?

Repair costs for known Audi Q7 issues range from $0 to $20,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Air Suspension System Failure (Compressor and Springs), typically costs $1,200-$5,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2007-2015 Audi Q7 Air Suspension System Failure (Compressor and Springs)?

The 4L Q7 air suspension is the most failure-prone system on the vehicle. The heavy SUV stresses air springs to their limits, causing rubber bellows to crack and leak. The compressor overworks to compensate and burns out its motor. The valve block can also stick, sending air to t… Repairs typically run $1,200-$5,000. Severity: high.

What is the 2007-2015 Audi Q7 Water Pump and Thermostat Failure (Overheating)?

The 2007-2015 Audi Q7 (3.0T, 3.6L, TDI) experiences water pump and thermostat failures causing engine overheating. Plastic impeller water pumps fail from debris clogging or electronic failures. When pump fails, coolant flow drops causing rapid overheating and severe engine damage… Repairs typically run $800-$5,000. Severity: high.

All 9 Known Issues

2007-2015 Audi Q7: Water Pump and Thermostat Failure (Overheating)#

Common Symptoms

How to Fix

What Owners Are Using

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2007-2015 Audi Q7: Timing Chain Tensioner Failure (Catastrophic Engine Damage)#

Common Symptoms

How to Fix

What Owners Are Using

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2011-2023 Audi Q7: Severe Carbon Buildup Causing Valve Damage (3.0T TFSI)#

Common Symptoms

How to Fix

What Owners Are Using

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2013-2015 Audi Q7: TDI Oil Cooler Leak into Brake Booster (Safety Recall)#

Common Symptoms

How to Fix

What Owners Are Using

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2011-2015 Audi Q7: Supercharger Bearing Failure and Boost Leaks (3.0T)#

Common Symptoms

How to Fix

What Owners Are Using

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2009-2016 Audi Q7: TDI Diesel Emissions Scandal and Recalls (Dieselgate)#

Common Symptoms

How to Fix

What Owners Are Using

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2007-2015 Audi Q7: Air Suspension System Failure (Compressor and Springs)#

Common Symptoms

How to Fix

What Owners Are Using

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2007-2015 Audi Q7: Air Suspension Strut Failure and Compressor Issues#

Common Symptoms

How to Fix

What Owners Are Using

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2007-2019 Audi Q7: Transfer Case Fluid Leak and Failure#

Common Symptoms

How to Fix

What Owners Are Using

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Other Audi Models

Frequently Asked Questions

What are the most common Audi Q7 problems?

Is the Audi Q7 reliable?

How much does it cost to fix common Audi Q7 problems?

What is the 2007-2015 Audi Q7 Air Suspension System Failure (Compressor and Springs)?

What is the 2007-2015 Audi Q7 Water Pump and Thermostat Failure (Overheating)?

What is the 2013-2015 Audi Q7 TDI Oil Cooler Leak into Brake Booster (Safety Recall)?

What is the 2011-2015 Audi Q7 Supercharger Bearing Failure and Boost Leaks (3.0T)?

What is the 2007-2015 Audi Q7 Timing Chain Tensioner Failure (Catastrophic Engine Damage)?

What is the 2009-2016 Audi Q7 TDI Diesel Emissions Scandal and Recalls (Dieselgate)?

What is the 2011-2023 Audi Q7 Severe Carbon Buildup Causing Valve Damage (3.0T TFSI)?

What is the 2007-2019 Audi Q7 Transfer Case Fluid Leak and Failure?

What is the 2007-2015 Audi Q7 Air Suspension Strut Failure and Compressor Issues?