Audi S7 Problems: 5 Issues Every Owner Should Know
2012-2026 model years · Based on 0+ owner reports · Last updated March 2026
According to Au7o's analysis of 0+ owner reports, the 2012-2026 Audi S7 has 5 documented known issues, with 1 rated critical by the Au7o research team. The most serious is Turbocharger Oil Strainer Blockage Causing Engine Stall (4.0T NHTSA Recall) ($0-$16,000 repair). Across all issues, repair costs range from $0 to $16,000. Full technical analysis and DIY maintenance guides at au7o.io.
All 5 Known Issues
The Audi S7 (2012-2017) with the 4.0T twin-turbo V8 has a critical design flaw in the turbocharger oil supply system. A poorly designed oil strainer (screen) collects oil sludge and carbon deposits, blocking oil flow to the turbocharger bearings. Oil-starved turbo bearings fail, causing the turbine wheel to contact the housing or the turbo shaft to break. This leads to sudden engine stall while driving—including on highways—with the engine unable to restart. NHTSA received 58 complaints and opened an investigation. Audi received 1,889 warranty claims and 47 field reports. NHTSA Recall 22V178 covers 2013-2017 S6, S7, RS7, A8, and S8 models. Audi extended the turbocharger warranty to 10 years/120,000 miles and will replace the oil strainer with a larger-mesh version. Vehicles built after March 30, 2017 already have the updated screen.
Common Symptoms
- Engine stall while driving (cannot restart)
- Unusual whining or grinding noise from turbochargers
- Reduced engine power or acceleration
- Check engine light with turbo underboost codes
- Oil smoke from exhaust (turbo seal failure)
- Engine difficult to start after sitting
- Loss of power at highway speeds (dangerous)
How to Fix
RECALL REPAIR (FREE): Contact Audi dealer for NHTSA Recall 22V178 (Audi recall 21H7). The dealer will replace the turbocharger oil strainer with an updated version that has larger mesh perforations to prevent clogging. WARRANTY EXTENSION: Audi extended the turbocharger warranty to 10 years/120,000 miles. If turbo damage already occurred, replacement may be covered. If TURBO DAMAGED: Replace turbocharger(s) ($4,000-$8,000 per turbo, $8,000-$16,000 for pair). PREVENTION: Use high-quality synthetic oil (Castrol Edge 5W-40 or equivalent) and change every 5,000 miles—never exceed 7,500. Avoid extended idling which accelerates carbon buildup in oil passages.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- TipCheck your VIN at NHTSA.gov/recalls or Audi's recall lookup to verify coverage. Even if you purchased used, the recall repair is FREE at any Audi dealer.
- NoteThis is a SAFETY recall. The engine can stall at highway speeds with no restart. Do not delay the recall repair. If your S7 stalls while driving, shift to neutral, activate hazard lights, and coast to safety.
- TipShort oil change intervals (5,000 miles) with premium synthetic oil significantly reduce carbon/sludge formation that clogs the oil strainer. Never use conventional oil in the 4.0T.
The 4.0L twin-turbo V8 develops wastegate rattle at idle due to wear in the wastegate actuator mechanism. Combined with carbon buildup from direct injection, this can cause performance degradation.
Common Symptoms
- Rattling at idle
- Wastegate flutter sound
- Reduced boost
- Check engine light
How to Fix
The Audi S7 (2012-2018) with the 4.0T twin-turbo V8 develops carbon buildup on intake valves due to direct fuel injection. With 8 cylinders and twin turbochargers generating high crankcase pressure, carbon accumulation is more aggressive than on smaller engines. The hot-vee design (turbochargers mounted between the cylinder banks) also contributes to higher under-hood temperatures that bake deposits faster. Symptoms appear between 40,000-80,000 miles and include rough idle, misfires, and reduced power. Walnut blasting on a V8 is more expensive than on 4-cylinder engines due to double the cylinders and the complexity of the hot-vee layout. Audizine and AudiWorld forums recommend cleaning every 40,000-60,000 miles as preventive maintenance. Neglecting carbon cleaning can lead to valve damage and $6,000+ engine repairs.
Common Symptoms
- Rough or unstable idle, especially when cold
- Misfires on one or more cylinders
- Hesitation during acceleration
- Reduced power output at higher RPM
- Poor fuel economy (below 15 MPG city)
- Check engine light with misfire codes
- Engine stumbling under partial throttle
How to Fix
WALNUT BLASTING: Remove intake manifolds and blast all 8 intake ports with walnut shells ($1,000-$2,000 for V8). The hot-vee design makes this more labor-intensive than typical V8 engines—expect 6-10 hours of labor. Repeat every 40,000-60,000 miles. CATCH CAN: Install dual oil catch cans ($400-$800) to capture PCV vapors from both banks. OIL CHANGES: Use premium 5W-40 synthetic and change every 5,000 miles. DRIVING HABITS: Regular highway driving at higher RPM helps slow carbon accumulation.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- TipThe 4.0T hot-vee design makes walnut blasting more complex than typical V8s. Find a shop experienced with Audi 4.0T engines specifically—not all European specialists have done this engine.
- UpgradeDual catch can setup required for the 4.0T—one for each bank. 034 Motorsport and JHM offer complete kits designed for the C7 S6/S7 platform. (034 Motorsport Dual Catch Can Kit (4.0T))
- NoteDo not attempt chemical de-carbon solutions on the 4.0T—the hot-vee turbo layout means chemicals can contaminate turbocharger bearings. Walnut blasting is the only safe method.
The Audi S7 (2012-2018) with the 4.0T twin-turbo V8 can exhibit excessive oil consumption, sometimes exceeding 1 quart per 1,000 miles. Audi's own Technical Service Bulletins acknowledge 'engine oil consumption too high' on the 4.0T TFSI and introduced updated piston rings for later production. Early models (2012-2015) are most commonly affected. The root cause is insufficient piston ring tension that allows oil to pass into the combustion chamber and burn. High boost pressure from twin turbochargers exacerbates the issue. Audi considers up to 1 quart per 2,000 miles 'within specification,' but many owners report consumption well beyond that threshold. If oil consumption exceeds Audi's spec, a dealer oil consumption test may qualify the vehicle for warranty piston ring replacement ($3,000-$6,000). BobIsTheOilGuy and AudiWorld forums document this extensively.
Common Symptoms
- Oil level drops significantly between oil changes
- Need to add 1+ quart every 1,000-2,000 miles
- Blue-white smoke from exhaust on startup or acceleration
- Oil consumption warning on dashboard
- Fouled spark plugs (oil-coated)
- Catalytic converter damage from oil contamination (long-term)
How to Fix
MILD (within Audi's spec of 1 qt/2,000 mi): Monitor oil level between changes, carry extra oil. Use heavier-weight oil if out of warranty (5W-40 rather than 0W-40). SEVERE (exceeds Audi's spec): Request Audi oil consumption test at dealer. If it fails, Audi TSB directs piston ring replacement ($3,000-$6,000 under warranty, $5,000-$8,000 out of pocket). The repair requires engine removal for the 4.0T. PREVENTION: Change oil every 5,000 miles with high-quality 5W-40 synthetic. Check oil level WEEKLY. Never let oil drop below minimum mark on dipstick—turbocharger bearings are extremely sensitive to low oil.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- TipRequest an official Audi oil consumption test before your warranty expires. The dealer will top off oil, seal the cap, and have you return in 1,000 miles to measure consumption. If it exceeds spec, piston ring replacement is covered.
- NoteThe 4.0T's twin turbochargers are extremely sensitive to low oil. Running low on oil, even briefly, can damage turbo bearings and lead to the oil strainer recall issue. Check oil level WEEKLY.
- TipKeep a quart of Castrol Edge 5W-40 in the trunk at all times. The 4.0T oil capacity is approximately 8.5 quarts and consumption can spike during spirited driving or track use.
The Audi S7 (2012-2018) with the heavy 4.0T twin-turbo V8 experiences premature motor mount failure. The hydraulic-filled engine mounts deteriorate and collapse, causing excessive engine movement, vibration, and clunking during acceleration and braking. The 4.0T's high torque output (406+ lb-ft) and the weight of the twin-turbo V8 stress the mounts beyond their design life. Failures commonly occur between 50,000-80,000 miles. Collapsed mounts allow the engine to shift excessively, which can stress exhaust connections, CV axles, and transmission mounts. RS246 and Audizine forums report motor mounts as one of the earlier-failing components on the C7 S6/S7/RS7 platform.
Common Symptoms
- Noticeable clunk or thud when accelerating from stop
- Excessive engine movement visible under hood
- Vibration transmitted to cabin at idle
- Clunking during hard braking (engine rocks forward)
- Exhaust rattle from stressed connections
- Transmission shifts feel harsher (engine movement affects alignment)
How to Fix
Replace both engine mounts as a pair ($800-$1,500 for both, $1,500-$2,500 with labor). Always replace BOTH mounts simultaneously—if one has failed, the other is close behind. Use OEM Audi mounts for proper damping characteristics. Aftermarket solid mounts increase NVH (noise/vibration) significantly. INSPECT: Check transmission mount at the same time—it often wears concurrently. Replace transmission mount if showing signs of deterioration ($400-$800 additional).
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeOEM Audi hydraulic engine mounts are the recommended replacement. RS246 forum consensus: aftermarket solid polyurethane mounts are too harsh for daily driving in the S7. (Genuine VW/Audi Engine Mount Set (4.0T))
- TipA simple test: have someone rev the engine in drive with the brake held while you watch under the hood. Excessive engine rocking (more than 1 inch) indicates worn mounts.
Frequently Asked Questions
What are the most common Audi S7 problems?
According to Au7o's analysis of 0+ owner reports, the 2012-2026 Audi S7 has 5 documented issues. The most frequently reported are: Turbocharger Oil Strainer Blockage Causing Engine Stall (4.0T NHTSA Recall), Turbo Wastegate Rattle and Carbon Buildup, Carbon Buildup on Intake Valves (4.0T Twin-Turbo V8). Of these, 1 is rated critical and should be addressed promptly.
Is the Audi S7 reliable?
The 2012-2026 Audi S7 has 5 known issues documented across 0+ owner reports. 1 issue is rated critical: Turbocharger Oil Strainer Blockage Causing Engine Stall (4.0T NHTSA Recall). 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 S7 problems?
Repair costs for known Audi S7 issues range from $0 to $16,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Turbocharger Oil Strainer Blockage Causing Engine Stall (4.0T NHTSA Recall), typically costs $0-$16,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What year Audi S7 is the most reliable?
Reliability varies across model years of the Audi S7. Based on owner reports, issues 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 2012-2026 Audi S7 with 5 documented issues from 0+ owner reports.
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