Used car guide

2020 BMW 5 Series: common problems and what to check

What gets flagged at MOT on 2020 BMW 5 Seriess, from 4,064 tests in 2025, plus known faults and what to look at before you buy one.

4,064MOT tests in 2025
88%pass first time (all 2020 cars: 86%)
9,100typical miles a year
23%had tyres flagged

What gets flagged at MOT

The share of 2020 BMW 5 Series MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    23% 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.

  • Brakes
    6% 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
    4% 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.

  • Lights and electrics
    4% 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
    3% of testsRough price £15–£250

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

  • Seats and seatbelts
    2% of testsRough price £80–£250

    At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.

Looking at a BMW 5 Series?

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Other years

YearMOT testsMost flagged
20222,222Tyres 24%
20211,817Tyres 21%
201915,159Tyres 24%
201818,470Tyres 25%
201713,069Tyres 24%
20135,675Tyres 30%
20125,661Tyres 30%
20111,011Tyres 30%
2010591Suspension 30%
2009619Suspension 39%
2008685Suspension 38%
2007736Suspension 45%
2006623Suspension 46%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2020 BMW 5 Seriess registered in 2020. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score