Does the BMW 4 Series fail the MOT on seat belts and airbags more than it should?

The BMW 4 Series records 0.13 seat belts and airbags failure items per 100 initial MOT tests (2019–2024), against 0.35 expected for a car of the same age mix: about as expected for its class and age (the difference is within its interval or under 0.5 items per 100 tests) (−0.22, 95% interval −0.24 to −0.21). It ranks 381 of 627 models on seat belts and airbags (1 = most failures above expected).

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on seat belts and airbags · check a BMW 4 Series by registration

What exactly fails on seat belts and airbags?

The most frequent DVSA defect wording in this group on the BMW 4 Series is “Seat belt buckle missing, damaged or not functioning as intended”, recorded 243 times in 2019–2024.

BMW 4 Series: most frequent seat belts and airbags defect wordings, 2019–2024 (30+ items each)
DVSA defect wording	Items	Per 100 tests
Seat belt buckle missing, damaged or not functioning as intended	243	0.05
An SRS malfunction indicator lamp (MIL) indicates a system malfunction	230	0.04
Seat belt not functioning as intended or of an incorrect type	67	0.01
Seat belt retractor not functioning as intended	36	0.01
A seat belt webbing or flexible stalk significantly stretched or weakened	33	0.01

Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 525,142 (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

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Does the BMW 4 Series fail the MOT on seat belts and airbags more than it should?

What exactly fails on seat belts and airbags?

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