The Audi A6 is a large premium executive saloon and Avant estate — popular as a high-spec company car and luxury used buy. The C7 (2011–2018) and C8 (2018–present) are the most common examples. High mileages are typical given fleet use and the 3.0 TDI is a particularly common engine choice.
Quick Facts — Audi A6
Common Engines
1.8 TFSI, 2.0 TFSI, 3.0 TFSI, S6, RS6, 2.0 TDI, 3.0 TDI
6 Most Common Audi A6 Problems
These are the faults most frequently seen on the Audi A6 by UK garages — ranked by how commonly they occur and what they cost to fix.
EA888 Gen 1 and 2 timing chain issues apply to the 2.0 TFSI A6 as with other VW Group applications.
💷 Typical repair cost: £800–£2,500
The 3.0 TDI A6 is a common fleet car with high mileages. DPF blockages, EGR valve failures and AdBlue system faults are all regularly seen at garages.
💷 Typical repair cost: £200–£2,000
A6 models with air suspension develop compressor and air bag failures. Uneven ride height and a warning light are the symptoms.
💷 Typical repair cost: £500–£2,000
Older A6 models with the Multitronic CVT gearbox are prone to chain and bearing failure — jerking, hesitation and loss of drive.
💷 Typical repair cost: £1,000–£3,000
The MMI navigation unit can develop screen failure, hard drive errors and connectivity issues on C6 and early C7 models.
💷 Typical repair cost: £300–£1,000
The Avant's electric tailgate can develop faults — failing to open or close. A motor or sensor issue.
💷 Typical repair cost: £150–£400
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Audi A6 — MOT Tips
Air suspension must operate correctly and evenly — uneven ride height is MOT-relevant. DPF and AdBlue warning lights are automatic fails. Check all dashboard warning lights before booking.
Engine management light on before your MOT? It's an automatic fail. Run a
MotorLoom diagnostic for £1.99 to get the likely cause and repair cost before booking the test.
Audi A6 Tyres
Most Audi A6 models run 225/55 R17 or 245/45 R18 or 255/40 R19 depending on trim level and year. Always check the placard inside the driver's door for the exact size for your vehicle.
Summary
The A6 is a superb premium executive car and exceptional used value. 3.0 TDI examples need careful DPF and EGR monitoring. Air suspension health is critical on equipped models. Always verify full service history.
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