Does the BMW X1 fail the MOT on noise, emissions and leaks more than it should?

The BMW X1 records 0.62 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 1.75 expected for a car of the same age mix: less than expected for its class and age (−1.13, 95% interval −1.17 to −1.10). It ranks 461 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 X1 by registration

What exactly fails on noise, emissions and leaks?

The most frequent DVSA defect wording in this group on the BMW X1 is “Engine MIL illuminated indicating a malfunction”, recorded 1,595 times in 2019–2024.

BMW X1: most frequent noise, emissions and leaks defect wordings, 2019–2024 (30+ items each)
DVSA defect wording	Items	Per 100 tests
Engine MIL illuminated indicating a malfunction	1,595	0.32
Emissions test unable to be completed	765	0.15
An induction or exhaust leak that could affect emissions levels	236	0.05
Smoke opacity levels exceed the manufacturer's specified limit	182	0.04
Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users	142	0.03

Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 503,065 (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 X1 gets a noise, emissions and leaks advisory, how often does it fail next time?

2.8% of BMW X1 MOTs with a noise, emissions and leaks advisory were followed by a fail in the same group at the next MOT, typically 11.9 months and 8,417 miles later (2,501 advisories followed).

Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 2,501 (advisories followed) · Method: the same vehicles followed to their next ordinary MOT · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

Does the BMW X1 fail the MOT on noise, emissions and leaks more than it should?

What exactly fails on noise, emissions and leaks?

If a BMW X1 gets a noise, emissions and leaks advisory, how often does it fail next time?

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