Volvo S40 vs Volvo Xc40 ultimate b4 mhev auto: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Volvo S40
70%
MOT pass rate · 104,637 vehicles
Volvo Xc40 ultimate b4 mhev auto
95%
MOT pass rate · 5,500 vehicles
More reliable
Verdict: On MOT pass rate, the Volvo Xc40 ultimate b4 mhev auto is the more reliable of the two — 95% pass first time versus 70%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Volvo S40 | Volvo Xc40 ultimate b4 mhev auto |
|---|---|---|
| MOT pass rate | 70% | 95% ✓ |
| MOT failure rate | 30% | 5% ✓ |
| Faults & advisories per test | 2.1 | 0.4 ✓ |
| Dangerous-fault share | 1% ✓ | 4% |
| Average mileage | 123,409 mi | 24,262 mi |
| Sample size (vehicles) | 104,637 | 5,500 |
Most common faults
Volvo S40
- 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)
- 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)
- Front Brake pad(s) wearing thin (3.5.1g)
- Parking brake: efficiency below requirements (3.7.B.7)
Volvo Xc40 ultimate b4 mhev auto
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside 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))
- Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
- Nearside Rear Tyre has a cut but not deep enough to reach the ply or cords (5.2.3 (d) (i))
Reliability FAQ
On MOT pass rate, the Volvo Xc40 ultimate b4 mhev auto is the more reliable of the two — 95% pass first time versus 70%. It's one signal among several; check the full breakdown below.
Full Volvo S40 report Full Volvo Xc40 ultimate b4 mhev 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.