Should I buy a 2018 Audi A4 1.4 Petrol Automatic B9?

Explore common problems, estimated repair costs and practical checks for the 2018 Audi A4 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

1High Likelihood

Coolant module leak from thermostat housing / water pump area

Low coolant warning, pink crusty residue around the front of the engine, or a sweet smell after a drive.

How to check

Warm the car fully, then park it and leave it idling for a minute before switching off.

Estimated Repair Cost

£900

2High Likelihood

Automatic gearbox low-speed hesitation or shunt

Jerky pull-away, hesitation when creeping, or a thumpy feel in stop-start traffic.

How to check

Creep in slow traffic pace, then pull away gently several times from a complete stop.

Estimated Repair Cost

£1,800

3Moderate Likelihood

Wheel bearing rumble

A droning or rumbling noise that builds with speed and may change slightly when cornering.

How to check

Drive at 30 to 60 mph on a smooth road and make gentle lane-position changes where safe.

Estimated Repair Cost

£450

MOT Failure Rate

0%10%20%30%0–20,000 miles: 6.7% (223 failed / 3,345 tests)20,000–40,000 miles: 11.5% (1,514 failed / 13,171 tests)40,000–60,000 miles: 15.8% (1,648 failed / 10,435 tests)60,000–80,000 miles: 17.6% (850 failed / 4,829 tests)80,000–100,000 miles: 18.5% (279 failed / 1,508 tests)100,000–120,000 miles: 19.9% (78 failed / 392 tests)120,000–140,000 miles: 22.4% (22 failed / 98 tests)140,000–160,000 miles: 19.6% (9 failed / 46 tests)160,000–180,000 miles: 15.4% (2 failed / 13 tests)180,000–200,000 miles: 14.3% (1 failed / 7 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2018 Audi A4 1.4 Petrol Automatic B9

Audi A4 buying questions

Is a 2018 Audi A4 worth buying?

It can be, but only if the individual car backs it up. For the 2018 Audi A4 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 A4 (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 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