Should I buy a 2012–2015 Audi A4 4.2 Petrol Automatic B8.5?

Explore common problems, estimated repair costs and practical checks for the 2012–2015 Audi A4 4.2 Petrol Automatic B8.5. Use this guide to help assess a used car, then unlock a personalised report for the exact vehicle you're considering.

Common problems

1Moderate Likelihood

Fuel rail seepage or leak

Fuel smell after parking, dampness around the top of the engine, or in some cases few warning signs before seepage becomes obvious.

How to check

Let the engine idle after a drive, then stand by the front wings with the bonnet open.

Estimated Repair Cost

£450

2High Likelihood

Direct-injection carbon build-up

Rough idle, occasional misfire, sluggish top-end pull, hesitant cold running, or a car that feels weaker than it should.

How to check

Start from cold if possible, let it idle, then accelerate progressively through the mid-range once warm.

Estimated Repair Cost

£1,000

3Moderate Likelihood

Auxiliary coolant pump failure

Coolant warning lights, hot smell after shutdown, fan running oddly, or temperature concerns after a drive.

How to check

Drive until fully warm, park up, leave the engine idling briefly, then switch off and listen around the front of the car.

Estimated Repair Cost

£780

MOT Failure Rate

0%10%20%30%0–20,000 miles: 7.1% (60 failed / 850 tests)20,000–40,000 miles: 10.8% (431 failed / 3,987 tests)40,000–60,000 miles: 11.7% (525 failed / 4,478 tests)60,000–80,000 miles: 13.1% (425 failed / 3,256 tests)80,000–100,000 miles: 14.4% (192 failed / 1,333 tests)100,000–120,000 miles: 15.1% (48 failed / 318 tests)120,000–140,000 miles: 17.9% (19 failed / 106 tests)140,000–160,000 miles: 27.9% (12 failed / 43 tests)160,000–180,000 miles: 18.2% (2 failed / 11 tests)180,000–200,000 miles: 0.0% (0 failed / 1 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2012–2015 Audi A4 4.2 Petrol Automatic B8.5

Audi A4 buying questions

Is a 2012–2015 Audi A4 worth buying?

It can be, but only if the individual car backs it up. For the 2012–2015 Audi A4 4.2 Petrol Automatic B8.5, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the Audi A4 (2012–2015)?

The problem cards above list the model-level checks for this guide. Read them as priorities for inspection and paperwork review, not proof that every example will have those faults.

What should I check before buying an Audi A4?

Look for evidence, not just assurances: MOT advisories, service history, repair invoices, warning lights, fluid leaks, tyre and brake condition, and how the car behaves on a proper test drive. And of course, look at your personalised Should I Buy This Car? report, outlining a full list of common issues in detail, a personalised road test, a plain-English explanation and a MotorIQ score.

A model guide is useful. A report on its registration is better.

The guide above gives you the model-level pattern. A personalised MotorIQ report checks the registration-specific record and turns it into an ownership view before you commit.

Or enter the vehicle manually