Audi · Known Issues
2009 Audi S5 Problems: 7 Known Issues
2009 model year · 497+ owner reports · Updated September 2026
2009 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2009 model year · 497+ owner reports · Updated September 2026
2009 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's analysis of 497+ owner reports, the 2009 Audi S5 has 7 documented known issues, with 2 rated critical. The most serious are High-Pressure Fuel Pump N276 Metering Valve Failure and Cam Follower Wear (4.2 FSI V8) ($900-$2,600 repair) and 4.2L FSI V8 (CAUA) Excessive Oil Consumption from Carbon-Clogged Low-Tension Piston Rings ($6,000-$14,000 repair). The most commonly reported issue is Thermostat and Water Pump Assembly Failure with 211 owner reports. Across all issues with published estimates, repair costs range from $150 to $14,000. DIY maintenance guides at au7o.io.
SEAT BELTS:REAR/OTHER:RETRACTOR
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021 Volkswagen ID4, Audi A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A5 Sportback, A6 Allroad, A6 Sedan, A7, A8, E-Tron Quattro, E-Tron Sportback Quattro, Q3, Q5, Q5 Sportback, Q7, Q8, RS5 Sportback, RS5 Coupe, RS6 Avant, RS7, RSQ8, S4 Sedan, S5 Cabriolet, S5 Coupe, S5 Sportback, S6 Sedan, S7, S8, SQ5, SQ5 Sportback, SQ7, SQ8, and 2021-2022 S3 Sedan vehicles. The rear seat belt automatic locking retractors may deactivate early, which can prevent the child restraint system from securing properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
TIRES
Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2021 Audi A5 Sportback, RS5 Coupe, RS5 Sportback, S5 Sportback, 2020-2021 A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A6 Allroad, A6 Sedan, A7, A8, Q5, S4 Sedan, S5 Coupe, S5 Cabriolet, S6 Sedan, S7, S8, SQ5, 2021 Q5 Sportback, Q7, Q8, RS6 Avant, RS7, RSQ8, SQ5 Sportback, SQ7, and SQ8 vehicles. The rear axle alignment may not have been inspected after the repairs for Recall 21V-295 (42L1) were performed.
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According to Au7o's analysis of 497+ owner reports, the 2009 Audi S5 has 7 documented issues. The most frequently reported are: High-Pressure Fuel Pump N276 Metering Valve Failure and Cam Follower Wear (4.2 FSI V8), 4.2L FSI V8 (CAUA) Excessive Oil Consumption from Carbon-Clogged Low-Tension Piston Rings, Thermostat and Water Pump Assembly Failure. Of these, 2 are rated critical and should be addressed promptly.
The 2009 Audi S5 has 7 known issues documented across 497+ owner reports. 2 issues are rated critical: High-Pressure Fuel Pump N276 Metering Valve Failure and Cam Follower Wear (4.2 FSI V8) and 4.2L FSI V8 (CAUA) Excessive Oil Consumption from Carbon-Clogged Low-Tension Piston Rings. 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.
Repair costs for known Audi S5 issues range from $150 to $14,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, High-Pressure Fuel Pump N276 Metering Valve Failure and Cam Follower Wear (4.2 FSI V8), typically costs $900-$2,600 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The 4.2 FSI V8 runs two camshaft-driven high-pressure fuel pumps. The N276 fuel metering/pressure regulator solenoid integrated into the pump is a documented failure point, and the solenoid is not sold separately, so a failure condemns the whole pump. Separately, the steel cam fo… Repairs typically run $900-$2,600. Severity: high.
The B8 S5's 4.2L FSI V8 uses low-tension oil control rings that coke up with carbon over time, letting oil past the rings and into the combustion chamber. Owners report burning roughly a quart every 1,000-3,000 miles, and in advanced cases the trapped carbon and oil dilution lead… Repairs typically run $6,000-$14,000. Severity: high.
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.
EXTERIOR LIGHTING:TAIL LIGHTS
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi RS5 Sportback, 2020-2021 Audi A5 Sportback, and S5 Sportback vehicles. The wiring harness for the rear lights could be missing the anti-abrasion protection in the area of the spare wheel well.
SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Q7, Q8, Q5 Sportback, SQ5 Sportback, RS6 Avant, RS7, RS Q8, 2020-2021 Audi S6 sedan, Q5, A8, S8, A7, A6 Allroad, A5 Cabriolet, A4 sedan, A4 Allroad, SQ5, S7, A6 sedan, S5 coupe, S4 sedan, S5 Cabriolet, A5 coupe, 2019-2021 RS5 coupe, A5 Sportback, S5 Sportback, RS5 Sportback vehicles. The lock nut on the trailing arm of the rear axle may break due to stress corrosion.
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2023 Audi S5 Cabriolet, A4 Allroad, Q5 Sportback, A3 Sedan, S5 Sportback, SQ7, TT Coupe, TT Roadster, RS5 Sportback, 2024 A8, E-Tron Quattro, E-Tron Sportback Quattro, Q8, RSQ8, 2023-2024 Q3, Q5, and Q7 vehicles. An electrical connection in the front passenger seat for the occupant detection system (ODS) control module may loosen and deactivate the front passenger air bag.
+ 5 more recalls. Check all on NHTSA.gov
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The S5 3.0T thermostat and water pump assembly uses a plastic housing that degrades over time. Leaks develop at the housing seams and O-ring seals, often around 60,000-80,000 miles. Repairs typically run $400-$1,000. Severity: medium.
The water-to-air intercooler system on the S5 3.0T uses an electric coolant pump that can fail, causing elevated charge air temperatures and reduced power. Heat soak becomes severe in warm climates. Repairs typically run $300-$700. Severity: medium.
The S5 suffers from carbon deposit accumulation on intake valves common to all Audi direct-injected engines. The performance-oriented tuning makes power loss from carbon more noticeable than in base models. Repairs typically run $400-$900. Severity: medium.
The B8/B8.5 chassis uses a multi-link front end with four upper links per side riding on small rubber bushings. The bushings crack and the ball joints develop play, producing a clunk or rattle over bumps (worst while turning) and a vague, wandering feel at highway speed, along wi… Repairs typically run $800-$2,200. Severity: medium.
B8 A5/S5 coupes route sunroof water down four drain tubes. The rubber elbow coupling where the tube meets the sunroof cassette hardens and stops sealing, and the tubes themselves clog with debris. Water then runs down the A-pillar and into the front footwell, or into the rear foo… Repairs typically run $150-$900. Severity: medium.