Used car guide

1999 BMW Z3: common problems and what to check

What gets flagged at MOT on 1999 BMW Z3s, from 2,635 tests in 2025, plus known faults and what to look at before you buy one.

2,635MOT tests in 2025
70%pass first time (all 1999 cars: 65%)
3,300typical miles a year
3.5×the usual rate for airbag warning light

What stands out

Parts flagged at MOT more often on 1999 BMW Z3s than on all cars registered in 1999.

  • Airbag warning light3.5× usual
    BMW Z3
    4.6% All 1999 cars
    1.3%

    Failed outright at MOT: 4.1%, against 1% of all 1999 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-lock braking system2.4× usual
    BMW Z3
    2.6% All 1999 cars
    1.1%

    Failed outright at MOT: 2.6%, against 1.1% of all 1999 cars. The rest were advisories or minor defects.

    Rough price £100–£350 our estimate

    At the viewing: On a quiet road, brake firmly from about 30mph. The car should stop straight without pulling.

Better than most

Chassis rust or damage: 2.5% here, against 5.9% of all 1999 cars. Track rod ends: 1.5% here, against 4.5% of all 1999 cars.

By area

The share of 1999 BMW Z3 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Suspension
    34% 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.

  • Brakes
    34% 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.

  • Lights and electrics
    23% of testsRough price £10–£80

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

  • Tyres
    19% 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
    13% 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.

  • Exhaust and emissions
    11% of testsRough price £100–£1,200

    At the viewing: Look for black soot in the tailpipe, listen for blowing from the exhaust and check for engine or DPF warning lights.

Looking at a BMW Z3?

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Other years

YearMOT testsMost flagged
20021,040Brakes 33%
20011,747Brakes 34%
20001,844Brakes 35%
19982,338Brakes 35%
19971,538Suspension 39%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 1999 BMW Z3s registered in 1999. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score