Quick Facts — Audi A6

Est. On UK Roads
250,000+
Years Made
1994–present
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.

1
Timing Chain (2.0 TFSI)
High Priority
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
2
DPF, EGR and AdBlue (3.0 TDI)
High Priority
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
3
Air Suspension Failure (if fitted)
Watch
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
4
Multitronic CVT Failure (Older models)
Watch
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
5
MMI Navigation Failure
Watch
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
6
Electric Boot Release Failure
Low Priority
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 Find Your Problem Now → 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.

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Frequently Asked Questions

What is the most common problem with the Audi A6?

The most frequently reported issue on the Audi A6 is Timing Chain (2.0 TFSI). EA888 Gen 1 and 2 timing chain issues apply to the 2.0 TFSI A6 as with other VW Group applications.

How many Audi A6s are on UK roads?

There are an estimated 250,000+ Audi A6s currently on UK roads.

What tyres does the Audi A6 use?

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.

Will a warning light fail my Audi A6's MOT?

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.

Similar Issues on Other Models

Audi A7 — shares the same air suspension failure problem Audi A8 — air suspension failure shows up here too

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.

If your Audi A6 has a warning light on or a symptom you can't identify, a Find Your Problem Now → gives you likely fault causes, UK repair cost estimates and MOT risk — instantly.

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Other Audi Models

Audi A1 → Audi A3 → Audi A4 → Audi A5 →