Bmw 520 vs Bmw M1 coupe: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Bmw 520
78%
MOT pass rate · 156,398 vehicles
Bmw M1 coupe
100%
MOT pass rate · 26 vehicles
Verdict: On MOT pass rate the Bmw 520 (78%) and Bmw M1 coupe (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Bmw 520 | Bmw M1 coupe |
|---|---|---|
| MOT pass rate | 78% | 100% ✓ |
| MOT failure rate | 22% | 0% ✓ |
| Faults & advisories per test | 1.6 | 0.1 ✓ |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 134,460 mi | 98,097 mi |
| Sample size (vehicles) | 156,398 | 26 |
Most common faults
Bmw 520
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Under-trays fitted obscuring some underside components
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Bmw M1 coupe
- Engine covers fitted obscuring some components in the engine bay
- Front Windscreen has damage to an area less than a 10mm circle within zone 'A' (8.3.1a)
- Under-trays fitted obscuring some underside components
- Engine covers and under trays fitted not allowing full inspection of some components.
Reliability FAQ
On MOT pass rate the Bmw 520 (78%) and Bmw M1 coupe (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Bmw 520 report Full Bmw M1 coupe report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.