Does the BMW Z3 fail the MOT on noise, emissions and leaks more than it should?
The BMW Z3 records 11.92 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 10.33 expected for a car of the same age mix: more than expected for its class and age (+1.59, 95% interval +1.35 to +1.83). It ranks 105 of 678 models on noise, emissions and leaks (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on noise, emissions and leaks · check a BMW Z3 by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the BMW Z3 is “Emissions levels exceed default limits”, recorded 3,574 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Emissions levels exceed default limits | 3,574 | 4.46 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 2,193 | 2.74 |
| Emissions levels exceed the manufacturer's specified limits | 1,594 | 1.99 |
| Emissions test unable to be completed | 832 | 1.04 |
| Engine MIL illuminated indicating a malfunction | 542 | 0.68 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 80,101 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
If a BMW Z3 gets a noise, emissions and leaks advisory, how often does it fail next time?
11.7% of BMW Z3 MOTs with a noise, emissions and leaks advisory were followed by a fail in the same group at the next MOT, typically 12.1 months and 1,516 miles later (6,156 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 6,156 (advisories followed) · Method: the same vehicles followed to their next ordinary MOT · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
Other pages for this model
BMW Z3 1998 · BMW Z3 1999 · BMW Z3 2000 · BMW Z3 2001 · BMW Z3 2002 · BMW Z3 2003 · BMW Z3 in the Netherlands · BMW Z3 by postcode area · BMW Z3 body, chassis and structure failures · BMW Z3 brakes failures · BMW Z3 vehicle identification failures · BMW Z3 lamps, reflectors and electrics failures · BMW Z3 road wheels failures · BMW Z3 seat belts and airbags failures · BMW Z3 steering failures · BMW Z3 suspension failures · BMW Z3 tyres failures · BMW Z3 visibility failures