2008 Audi A5 Problems: 4 Known Issues
2008 model year · 1,600+ owner reports · Updated October 2026
According to Au7o's analysis of 1,600+ owner reports, the 2008 Audi A5 has 4 documented known issues, with 2 rated critical. The most serious are S-Tronic/DSG Mechatronic Unit Failure ($1,500-$5,000 repair) and Timing Chain Tensioner Failure (2.0 TFSI Engine) ($2,000-$10,000 repair). The most commonly reported issue is S-Tronic/DSG Mechatronic Unit Failure with 1,600 owner reports. Across all issues with published estimates, repair costs range from $150 to $10,000. DIY maintenance guides at au7o.io.
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All 4 Known Issues
When Issues Typically Appear
NHTSA Recalls8 recalls
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi A8 and S8, 2022 Audi A5 Sportback, A4 Sedan, E-Tron GT, Q3, Q5, RS6 Avant, A3 Sedan, S5 Sportback, Q5 Sportback, Q7, Q8, RSQ8, SQ7, SQ8, and S3 Sedan vehicles. A software error may prevent the rear-view image from initially displaying when the vehicle begins to reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
EQUIPMENT:ELECTRICAL:INFOTAINMENT:VIDEO (TOUCH)SCREEN/MONITOR/UNIT
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021-2022 AUDI A8, A6 Allroad, E-TRON Quattro, 2022 S3, RSQ8, RS7, RS6 Avant, Q8, Q7, Q3, E-TRON Sportback Quattro, S5 Cabriolet, E-TRON GT, S5 Sportback, A7, A6, A5 Sportback, A5 Cabriolet, A4, A4 Allroad, A3, S8, SQ7, SQ8, S6, and S4 vehicles. The infotainment main unit may become damaged internally when the vehicle is shut off, resulting in an inoperative rearview camera display the next time the vehicle is started. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
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.
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.
SEATS
Volkswagen Group of America, Inc. (Audi) is recalling certain 2017-2020 A4 Allroad, A4 Sedan, 2018-2019 RS5 Coupe, 2019 RS5 Sportback, 2018-2020 A5 Cabriolet, A5 Coupe, A5 Sportback, S4 Sedan, S5 Cabriolet, S5 Coupe, and Audi S5 Sportback vehicles. The cable connecting the seat heater to the Passenger Occupant Detection System (PODS) may have a contact fault, causing the software to misdiagnose a malfunction and disable the passenger air bag.
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Frequently Asked Questions
What are the most common Audi A5 problems?
According to Au7o's analysis of 1,600+ owner reports, the 2008 Audi A5 has 4 documented issues. The most frequently reported are: S-Tronic/DSG Mechatronic Unit Failure, Timing Chain Tensioner Failure (2.0 TFSI Engine), Severe Carbon Buildup on Intake Valves (Direct Injection). Of these, 2 are rated critical and should be addressed promptly.
Is the Audi A5 reliable?
The 2008 Audi A5 has 4 known issues documented across 1,600+ owner reports. 2 issues are rated critical: S-Tronic/DSG Mechatronic Unit Failure and Timing Chain Tensioner Failure (2.0 TFSI Engine). 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 A5 problems?
Repair costs for known Audi A5 issues range from $150 to $10,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, S-Tronic/DSG Mechatronic Unit Failure, typically costs $1,500-$5,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2008-2017 Audi A5 S-Tronic/DSG Mechatronic Unit Failure?
The 7-speed S-Tronic (DL501) dual-clutch transmission in the A5 suffers from mechatronic unit failures. The mechatronic unit is the electro-hydraulic control module that manages gear selection and clutch engagement. Internal solenoid and valve body wear causes erratic shifting, s… Repairs typically run $1,500-$5,000. Severity: high.
What is the 2008-2016 Audi A5 Timing Chain Tensioner Failure (2.0 TFSI Engine)?
The B8/B8.5 A5 with the 2.0 TFSI engine (2008-2016) suffers from premature timing chain tensioner failure, identical to the A4 and A6. The tensioners wear out between 60,000-120,000 miles, causing the timing chain to stretch and rattle. A loud rattling noise on cold start from th… Repairs typically run $2,000-$10,000. Severity: high.
What is the 2008-2023 Audi A5 Severe Carbon Buildup on Intake Valves (Direct Injection)?
All direct-injection engines in the A5 and S5 (2.0 TFSI, 3.0T, and 3.2L V6) suffer from severe carbon buildup on intake valves. In direct-injection engines, fuel sprays directly into the cylinder, bypassing the intake valves. This means intake valves are only exposed to oil vapor… Repairs typically run $700-$1,800. Severity: medium.
What is the 2008-2015 Audi A5 Excessive Oil Consumption (2.0 TFSI Engine)?
The 2.0 TFSI engine in early B8 A5 models (2008-2015) suffers from excessive oil consumption due to defective piston ring design. Owners report burning 1 quart of oil every 500-1,200 miles, requiring constant top-ups. The issue is worst in 2010-2012 models with EA888 Gen 2 engine… Repairs typically run $150-$7,000. Severity: medium.
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.