Bmw 3 series vs Bmw X7 m50i auto: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Bmw 3 series
75%
MOT pass rate · 996,044 vehicles
Bmw X7 m50i auto
88%
MOT pass rate · 192 vehicles
More reliable
Verdict: On MOT pass rate, the Bmw X7 m50i auto is the more reliable of the two — 88% pass first time versus 75%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Bmw 3 series | Bmw X7 m50i auto |
|---|---|---|
| MOT pass rate | 75% | 88% ✓ |
| MOT failure rate | 25% | 12% ✓ |
| Faults & advisories per test | 2.0 | 0.7 ✓ |
| Dangerous-fault share | 2% ✓ | 8% |
| Average mileage | 128,558 mi | 37,613 mi |
| Sample size (vehicles) | 996,044 | 192 |
Most common faults
Bmw 3 series
- 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)
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Under-trays fitted obscuring some underside components
- Oil leak, but not excessive (8.4.1 (a) (i))
Bmw X7 m50i auto
- Offside Front 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))
- 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))
- Offside Rear Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (5.2.3 (d) (i))
- Nearside Rear Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (5.2.3 (d) (i))
Reliability FAQ
On MOT pass rate, the Bmw X7 m50i auto is the more reliable of the two — 88% pass first time versus 75%. It's one signal among several; check the full breakdown below.
Full Bmw 3 series report Full Bmw X7 m50i auto 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.