Should I buy a 2018 Audi A5 1.4 Petrol Automatic B9?

Explore common problems, estimated repair costs and practical checks for the 2018 Audi A5 1.4 Petrol Automatic B9. 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

Water pump and thermostat housing leaks

Coolant level dropping, sweet smell after a drive, pink residue in the engine bay, or temperature behaviour that is not fully stable.

How to check

Warm the car fully, let it idle briefly after the drive, then note the temperature behaviour and any sweet coolant smell.

Estimated Repair Cost

£650

2Moderate Likelihood

Ignition coil and spark misfire faults

Lumpy idle, hesitation under acceleration, flashing engine light, EPC warning, or a sudden drop in power.

How to check

Start from cold if possible, let it idle, then accelerate gently and again more firmly once warm.

Estimated Repair Cost

£350

3Moderate Likelihood

Wheel bearing wear and road-speed hum

A steady hum or drone that gets louder with speed, sometimes changing when the car loads up in a bend.

How to check

Drive at mixed road speeds on a smooth road and make a few gentle lane-position changes where safe.

Estimated Repair Cost

£300

MOT Failure Rate

0%10%20%30%40%0–20,000 miles: 8.4% (65 failed / 775 tests)20,000–40,000 miles: 11.3% (345 failed / 3,042 tests)40,000–60,000 miles: 16.2% (412 failed / 2,541 tests)60,000–80,000 miles: 19.4% (223 failed / 1,149 tests)80,000–100,000 miles: 19.9% (70 failed / 351 tests)100,000–120,000 miles: 17.5% (21 failed / 120 tests)120,000–140,000 miles: 14.3% (4 failed / 28 tests)140,000–160,000 miles: 30.8% (4 failed / 13 tests)160,000–180,000 miles: 0.0% (0 failed / 3 tests)180,000–200,000 miles: 0.0% (0 failed / 1 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2018 Audi A5 1.4 Petrol Automatic B9

Audi A5 buying questions

Is a 2018 Audi A5 worth buying?

It can be, but only if the individual car backs it up. For the 2018 Audi A5 1.4 Petrol Automatic B9, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the Audi A5 (2018)?

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 A5?

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