Used car guide

2003 BMW 3 Series: common problems and what to check

What gets flagged at MOT on 2003 BMW 3 Seriess, from 8,471 tests in 2025, plus known faults and what to look at before you buy one.

8,471MOT tests in 2025
67%pass first time (all 2003 cars: 59%)
5,400typical miles a year
1.6×the usual rate for engine oil leaks

What stands out

Parts flagged at MOT more often on 2003 BMW 3 Seriess than on all cars registered in 2003.

  • Engine oil leaks1.6× usual
    BMW 3 Series
    26.6% All 2003 cars
    16.2%

    Failed outright at MOT: 0.6%, against 0.4% of all 2003 cars. The rest were advisories or minor defects.

    Rough price £80–£600 our estimate

    At the viewing: Look under the engine and where the car is usually parked for fresh oil. Ask whether the leak has been looked at.

  • Flexible brake hoses1.6× usual
    BMW 3 Series
    9.7% All 2003 cars
    6%

    Failed outright at MOT: 1.8%, against 1.1% of all 2003 cars. The rest were advisories or minor defects.

    Rough price £50–£200 our estimate

    At the viewing: Look for cracked or bulging rubber hoses behind the wheels and in the engine bay.

  • Airbag warning light2× usual
    BMW 3 Series
    3% All 2003 cars
    1.5%

    Failed outright at MOT: 2.6%, against 1.3% of all 2003 cars. The rest were advisories or minor defects.

    Rough price £10–£80 our estimate

    At the viewing: Ask a friend to check every light while you work the switches: indicators, brake lights, fog lights and reversing lights.

  • Anti-roll bar bushes and joints1.8× usual
    BMW 3 Series
    3.2% All 2003 cars
    1.8%

    Failed outright at MOT: 0.7%, against 0.4% of all 2003 cars. The rest were advisories or minor defects.

    Rough price £100–£280 (pair of drop links) Checkatrade

    At the viewing: Drive slowly over bumps and listen for a knock or rattle from the front. Worn anti-roll bar links are a cheap fix.

Better than most

Headlights: 5.1% here, against 12.1% of all 2003 cars. Drive shaft (CV) joints: 0.4% here, against 6.6% of all 2003 cars.

By area

The share of 2003 BMW 3 Series MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Brakes
    43% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Suspension
    39% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Tyres
    29% of testsRough price £70–£150

    At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

  • Oil and fluid leaks
    28% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

  • Lights and electrics
    27% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Wipers, windscreen and mirrors
    11% of testsRough price £15–£250

    At the viewing: Check for chips in the driver's view, and test the wipers and washers.

Looking at a BMW 3 Series?

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Other years

YearMOT testsMost flagged
20203,166Tyres 24%
201911,430Tyres 25%
20188,504Tyres 26%
20173,622Tyres 26%
201624,243Tyres 27%
201530,049Tyres 29%
201429,426Tyres 31%
201331,654Tyres 30%
201230,461Tyres 32%
201124,841Tyres 34%
201022,691Suspension 38%
200920,166Suspension 40%
200819,093Suspension 42%
200721,666Brakes 42%
200615,748Brakes 46%
20059,866Brakes 45%
20047,889Brakes 43%
20026,561Brakes 42%
20014,182Brakes 40%
20002,180Brakes 42%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2003 BMW 3 Seriess registered in 2003. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score