Bmw 118 vs Bmw Z4 sdrive23i: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Bmw 118
81%
MOT pass rate · 195,122 vehicles
Bmw Z4 sdrive23i
93%
MOT pass rate · 82 vehicles
More reliable
Verdict: On MOT pass rate, the Bmw Z4 sdrive23i is the more reliable of the two — 93% pass first time versus 81%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Bmw 118 | Bmw Z4 sdrive23i |
|---|---|---|
| MOT pass rate | 81% | 93% ✓ |
| MOT failure rate | 19% | 7% ✓ |
| Faults & advisories per test | 1.5 | 0.0 ✓ |
| Dangerous-fault share | 4% | — ✓ |
| Average mileage | 85,676 mi | 61,579 mi |
| Sample size (vehicles) | 195,122 | 82 |
Most common faults
Bmw 118
- 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))
- 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 the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
Bmw Z4 sdrive23i
No fault breakdown available.
Reliability FAQ
On MOT pass rate, the Bmw Z4 sdrive23i is the more reliable of the two — 93% pass first time versus 81%. It's one signal among several; check the full breakdown below.
Full Bmw 118 report Full Bmw Z4 sdrive23i 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.