Does the Seat Arona fail the MOT on noise, emissions and leaks more than it should?

The Seat Arona records 0.66 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 0.65 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) (+0.01, 95% interval −0.03 to +0.06). It ranks 261 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 Seat Arona by registration

What exactly fails on noise, emissions and leaks?

The most frequent DVSA defect wording in this group on the Seat Arona is “Engine MIL illuminated indicating a malfunction”, recorded 631 times in 2019–2024.

Seat Arona: 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	631	0.47
Emissions levels exceed default limits	76	0.06
Lambda coefficient outside the default limits or the range specified by the manufacturer	70	0.05
Emissions levels exceed the manufacturer's specified limits	44	0.03
Emissions test unable to be completed	38	0.03

Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 132,980 (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 Seat Arona fail the MOT on noise, emissions and leaks more than it should?

What exactly fails on noise, emissions and leaks?

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