Quick Facts — Audi A4

Est. On UK Roads
400,000+
Years Made
1994–present
Common Engines
1.4 TFSI, 1.8 TFSI, 2.0 TFSI, 3.0 TFSI, S4, RS4, 1.6 TDI, 2.0 TDI, 3.0 TDI

6 Most Common Audi A4 Problems

These are the faults most frequently seen on the Audi A4 by UK garages — ranked by how commonly they occur and what they cost to fix.

1
Timing Chain (2.0 TFSI EA888 Gen 1/2)
High Priority
The 2.0 TFSI in early B8 A4 models carries the same EA888 timing chain tensioner fault as the A3. Cold-start rattle is the warning sign. Engine failure follows if ignored.
💷 Typical repair cost: £800–£2,500
2
DPF and EGR (2.0 TDI)
High Priority
The 2.0 TDI A4 is extremely common as an ex-fleet car with high mileage. DPF blockages and EGR carbon buildup are the most frequent faults seen at garages.
💷 Typical repair cost: £200–£1,500
3
Multitronic CVT Gearbox Failure
Watch
B7 and early B8 A4 models with the Multitronic CVT automatic gearbox are prone to chain and bearing failure. Juddering, loss of drive and warning lights are the symptoms.
💷 Typical repair cost: £1,000–£3,000
4
Carbon Buildup (2.0 TFSI)
Watch
Direct injection TFSI engines accumulate carbon deposits on intake valves. Regular walnut blasting every 40,000–60,000 miles prevents performance loss.
💷 Typical repair cost: £300–£600
5
Oil Consumption (2.0 TFSI)
Watch
The EA888 Gen 1 and 2 engines consume oil between services. Check the level regularly.
💷 Typical repair cost: Ongoing
6
MMI Infotainment Failure
Low Priority
MMI navigation and infotainment units can develop screen failures and navigation disc errors on older B8 models.
💷 Typical repair cost: £200–£800

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Audi A4 — MOT Tips

TFSI timing chain rattle is critical to check on 2008–2014 B8 models. DPF warning light is a fail on diesel A4s. Check CVT gearbox operation on automatic models — hesitation and shudder need investigation.

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 A4 Tyres

Most Audi A4 models run 205/60 R16 or 225/55 R17 or 245/40 R18 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 A4?

The most frequently reported issue on the Audi A4 is Timing Chain (2.0 TFSI EA888 Gen 1/2). The 2.0 TFSI in early B8 A4 models carries the same EA888 timing chain tensioner fault as the A3. Cold-start rattle is the warning sign. Engine failure follows if ignored.

How many Audi A4s are on UK roads?

There are an estimated 400,000+ Audi A4s currently on UK roads.

What tyres does the Audi A4 use?

Most Audi A4 models run 205/60 R16 or 225/55 R17 or 245/40 R18 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 A4's MOT?

TFSI timing chain rattle is critical to check on 2008–2014 B8 models. DPF warning light is a fail on diesel A4s. Check CVT gearbox operation on automatic models — hesitation and shudder need investigation.

Similar Issues on Other Models

Audi A5 — also commonly develops carbon buildup Volkswagen Passat — shares the same carbon buildup problem

Summary

The A4 is a premium, practical executive car at excellent used prices. EA888 timing chain health and DPF condition on high-mileage fleet diesels are the two most important things to check.

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Other Audi Models

Audi A1 → Audi A3 → Audi A5 → Audi A6 →