The Audi A4 is the definitive premium executive saloon and estate in the UK. The B8 (2008–2016) and B9 (2016–present) are the most common used examples. Available as saloon and Avant estate, both are hugely popular. Diesel variants are particularly common as fleet and company cars.
Quick Facts — Audi A4
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.
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
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
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
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
The EA888 Gen 1 and 2 engines consume oil between services. Check the level regularly.
💷 Typical repair cost: Ongoing
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.
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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.
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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