Skip to content

MOT reliability

Bmw 420i m sport auto

14,227 vehicles · 15,461 completed MOT tests analysed
90%
MOT pass rate

Based on 14,227 Bmw 420i m sport auto vehicles and 15,461 completed MOT tests, the Bmw 420i m sport auto has an overall 90% pass rate, with an average recorded mileage of 30,583 miles.

14,227
Vehicles
15,461
MOT tests
7,656
Avg miles / year
0.6
Faults per test
12%
Dangerous-fault share

Bmw 420i m sport auto problem areas

Where faults occur most across all Bmw 420i m sport auto MOT tests:

  • Tyres, wheels & suspension69%
  • Brakes11%
  • Other11%
  • Visibility6%
  • Lamps & electrical3%
  • Identification & plates2%
  • Seatbelts & equipment2%
  • Steering0%

Bmw 420i m sport auto pass rate by age

How the Bmw 420i m sport auto's MOT pass rate changes as it ages (buckets with 20+ tests).

Age (years)TestsPass rate
18100%
255094%
37,99790%
44,83590%
51,57489%
68991%

Fuel types: Petrol (14,055), Other (170), Diesel (1), Electric (1)

Most common Bmw 420i m sport auto MOT faults

These are the faults and advisories recorded most often across Bmw 420i m sport auto MOT tests:

  1. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (623 times)
  2. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (582 times)
  3. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (338 times)
  4. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii)) (298 times)
  5. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (272 times)
  6. Offside Front Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii)) (171 times)
  7. Nearside Front Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii)) (155 times)
  8. Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e)) (123 times)
  9. Nearside Front Tyre has a cut but not deep enough to reach the ply or cords (5.2.3 (d) (i)) (104 times)
  10. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii)) (99 times)
  11. Nearside Rear Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (5.2.3 (d) (i)) (90 times)
  12. Offside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e)) (90 times)
  13. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii)) (89 times)
  14. Offside Rear Nail in tyre (87 times)
  15. Nearside Rear Nail in tyre (87 times)

Bmw 420i m sport auto pass rate by registration year

YearVehiclesTestsPass rateAvg mileage
2025 1 1 100% 9,188
2024 7 7 100% 10,936
2023 1,179 1,356 91% 25,243
2022 2,834 5,039 90% 28,270
2021 2,711 7,704 90% 33,976
2020 268 948 91% 38,372

Bmw 420i m sport auto reliability FAQ

Across 14,227 Bmw 420i m sport auto vehicles in our MOT data, 90% pass the MOT (a 10% failure rate), with about 0.6 faults or advisories recorded per test.

The most frequently recorded Bmw 420i m sport auto MOT issues are: Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e)); Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e)); Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e)).

The typical Bmw 420i m sport auto in our data has covered around 30,583 miles.

Compare the Bmw 420i m sport auto

See how the Bmw 420i m sport auto stacks up against other Bmw models on MOT reliability:

420i m sport auto vs 3 series 420i m sport auto vs 118 420i m sport auto vs 316 420i m sport auto vs 520

Check a specific Bmw 420i m sport auto

Enter a registration to see that exact vehicle's full MOT history, advisories and recurring faults.

See all Bmw models · Learn about common MOT failures · what an MOT checks