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BMW 420D MOT reliability
BMW 420Ds passed their MOT first time 87% of the time across 2,759 tests in 2025.
First-time pass rate
87%
MOTs analysed
2,759
Still licensed (GB)
–
Body type
–
Pass rate by year of first registration
In detail:
First registered
2020
2020 ed
134 MOTs
Passed first time 85%. Typical mileage 39,980 (most between 28,907 and 52,416).
2022: 100% → 2023: 92% → 2024: 95% → 2025: 85%
Most common failures
- Condition: has a bulge, caused by separation or partial failure of its structure (3.7%)
- Condition: has ply or cords exposed (3.0%)
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (2.2%)
- Tread depth below requirements of 1.6mm (1.5%)
- Malfunction indicator lamp: inoperative or indicates a malfunction (1.5%)
2020 hybrid
2 MOTs
Passed first time 100%. Typical mileage 16,209 (most between 13,203 and 19,216).
2024: 100% → 2025: 100%
Most common failures
2020 diesel
1 MOT
Passed first time 100%. Typical mileage 56,171 (most between 56,171 and 56,171).
2024: 100% → 2025: 100%
Most common failures
Where 2020 420Ds fail
Wheels & tyres
10.4%
Brakes
1.5%
Exhaust, emissions & leaks
1.5%
Body, structure & corrosion
0.7%
Lights & electrics
0.7%
Suspension & axles
0.7%
Visibility & wipers
0.7%
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