Should I buy a 2018 BMW 3-Series 2.0 Diesel Automatic F30 LCI?

Explore common problems, estimated repair costs and practical checks for the 2018 BMW 3-Series 2.0 Diesel Automatic F30 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

EGR cooler coolant leak and fire risk

Coolant level drops without an obvious puddle, the fan may run more than expected, and some cars develop a hot smell, rough running, smoke, or warning lights.

How to check

Warm the car fully, then let it idle for a minute after the drive with the bonnet open.

Estimated Repair Cost

£900

2Moderate Likelihood

NOx, SCR and exhaust temperature sensor faults

Engine light or emissions warning, sometimes with little change in how the car drives at first.

How to check

Scan the fault memory. Identify whether the failed part is a NOx sensor, temperature sensor, or SCR-related component.

Estimated Repair Cost

£580

3Moderate Likelihood

Water ingress into footwells from drains or roof plumbing

Damp carpets, misted windows, musty smell, or unexplained electrical oddities after heavy rain.

How to check

After the drive, open the doors and press firmly into the front and rear carpet edges with your hand.

Estimated Repair Cost

£600

MOT Failure Rate

0%5%10%15%20%0–20,000 miles: 6.2% (127 failed / 2,042 tests)20,000–40,000 miles: 9.3% (995 failed / 10,667 tests)40,000–60,000 miles: 11.3% (1,283 failed / 11,363 tests)60,000–80,000 miles: 13.2% (1,010 failed / 7,648 tests)80,000–100,000 miles: 13.2% (481 failed / 3,640 tests)100,000–120,000 miles: 15.9% (235 failed / 1,479 tests)120,000–140,000 miles: 17.9% (112 failed / 627 tests)140,000–160,000 miles: 17.9% (45 failed / 251 tests)160,000–180,000 miles: 14.5% (16 failed / 110 tests)180,000–200,000 miles: 14.8% (8 failed / 54 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2018 BMW 3-Series 2.0 Diesel Automatic F30 LCI

BMW 3-Series buying questions

Is a 2018 BMW 3-Series worth buying?

It can be, but only if the individual car backs it up. For the 2018 BMW 3-Series 2.0 Diesel Automatic F30 LCI, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the BMW 3-Series (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 3-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