Should I buy a 2015–2018 BMW 1-Series 1.5 Petrol Manual F20 LCI?

Explore common problems, estimated repair costs and practical checks for the 2015–2018 BMW 1-Series 1.5 Petrol Manual F20 LCI. 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

Cooling module leaks and water pump/thermostat failure

Coolant smell, low-coolant warnings, fan running loudly, temperature warnings, or light steam after a drive.

How to check

Warm the car fully, drive normally for 15-20 minutes, then let it idle for a minute after stopping.

Estimated Repair Cost

£1,200

2Moderate Likelihood

Ignition coil and spark plug misfires

Rough idle, hesitation, occasional flashing engine light, or a drivetrain warning under acceleration.

How to check

Start from cold, let it idle, then accelerate progressively through the rev range.

Estimated Repair Cost

£450

3Moderate Likelihood

Intake valve carbon buildup

Gradual loss of sharpness, uneven idle, hesitation, or reduced performance without an obvious single failed part.

How to check

Drive from low revs in a higher gear, then accelerate smoothly through the mid-range.

Estimated Repair Cost

£700

MOT Failure Rate

0%10%20%30%0–20,000 miles: 6.5% (1,955 failed / 30,119 tests)20,000–40,000 miles: 11.4% (9,514 failed / 83,336 tests)40,000–60,000 miles: 15.6% (9,668 failed / 62,104 tests)60,000–80,000 miles: 18.4% (5,409 failed / 29,467 tests)80,000–100,000 miles: 20.3% (2,027 failed / 10,004 tests)100,000–120,000 miles: 21.7% (566 failed / 2,610 tests)120,000–140,000 miles: 23.0% (133 failed / 578 tests)140,000–160,000 miles: 24.0% (37 failed / 154 tests)160,000–180,000 miles: 20.7% (6 failed / 29 tests)180,000–200,000 miles: 14.3% (1 failed / 7 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2015–2018 BMW 1-Series 1.5 Petrol Manual F20 LCI

BMW 1-Series buying questions

Is a 2015–2018 BMW 1-Series worth buying?

It can be, but only if the individual car backs it up. For the 2015–2018 BMW 1-Series 1.5 Petrol Manual F20 LCI, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the BMW 1-Series (2015–2018)?

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 a BMW 1-Series?

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