Used car guide

2005 MINI ONE: common problems and what to check

What gets flagged at MOT on 2005 MINI ONEs, from 196 tests in 2025, plus known faults and what to look at before you buy one.

Small sample: only 196 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.

196MOT tests in 2025
59%pass first time (all 2005 cars: 58%)
5,100typical miles a year
2.5×the usual rate for engine oil leaks

What stands out

Parts flagged at MOT more often on 2005 MINI ONEs than on all cars registered in 2005.

  • Engine oil leaks2.5× usual
    MINI ONE
    35.7% All 2005 cars
    14.5%

    Failed outright at MOT: 0%, against 0.3% of all 2005 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.

  • Rigid brake pipes2.1× usual
    MINI ONE
    30.6% All 2005 cars
    14.9%

    Failed outright at MOT: 4.1%, against 2.4% of all 2005 cars. The rest were advisories or minor defects.

    Rough price £100–£400 our estimate

    At the viewing: Ask to see underneath, or check the MOT advisories: corroded brake or fuel pipes get worse every year and fail the MOT when they do.

  • Sub-frame2.3× usual
    MINI ONE
    15.8% All 2005 cars
    6.8%

    Failed outright at MOT: 0%, against 0.3% of all 2005 cars. The rest were advisories or minor defects.

    Rough price £300–£1,000 our estimate

    At the viewing: Look underneath at the frame the suspension bolts to. Flaky rust or holes are expensive to fix.

By area

The share of 2005 MINI ONE MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Brakes
    55% 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
    47% 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.

  • Oil and fluid leaks
    40% 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
    40% 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
    31% 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.

  • Wipers, windscreen and mirrors
    17% of testsRough price £15–£250

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

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Other years

YearMOT testsMost flagged
20221,208Tyres 28%
20211,313Tyres 29%
20201,138Tyres 30%
20191,556Tyres 32%
20181,568Tyres 30%
20175,366Tyres 32%
20168,296Tyres 31%
201510,360Tyres 31%
20146,152Tyres 31%
20137,001Tyres 32%
20124,267Tyres 32%
20111,045Tyres 34%
2010599Tyres 33%
2009343Tyres 33%
2008290Brakes 39%
2007252Lights and electrics 38%
2006183Brakes 52%
2004134Brakes 57%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2005 MINI ONEs registered in 2005. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score