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MOT failures by make

Vauxhall MOT failures for “Exhaust system: has a major leak of exhaust gases”

Vauxhall cars failed their MOT on “Exhaust system: has a major leak of exhaust gases” in 1.53% of 6,000,257 tests in 2023–2024 (92,086 tests) — 1.7 times as often as comparable cars of the same age, mileage and fuel, which would have failed on it in about 0.92% of tests. It is the number 11 most common failure item on Vauxhalls.

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Data to 2024-12-30 · Page updated 2026-09-28 · Publisher: 73 Auto

Vauxhall tests failing on it
1.53%
92,086 of 6,000,257 tests, 2023–2024
Comparable cars
0.92%
national rate at the same age, mileage and fuel
Observed ÷ expected
1.68×
73 Auto analysis · rank #11 for Vauxhall

How unusual this is for the make

Across all MOT failures, Vauxhalls fail 1.14× as often as comparable cars. On this item the gap is 1.47× wider than that overall level, so it is a genuine Vauxhall pattern rather than a reflection of how often the make fails in general. It is a major defect in the body, chassis and structure part of the test. Nationally it appears on 0.78% of MOT tests.

Vauxhall models and “Exhaust system: has a major leak of exhaust gases”

The Vauxhall Crossland is most affected (6.69× comparable cars); the Vauxhall Movano least (0.39×). Not every model follows the make: the pattern is concentrated in some models. Model rows compare with cars of the same age and fuel.

Vauxhall models: share of MOT tests failing on Exhaust system: has a major leak of exhaust gases
ModelTestsFailed on itvs similar cars
Vauxhall Crossland118,6720.30%6.69×
Vauxhall Mokka453,5531.38%4.39×
Vauxhall Combo216,7501.70%3.26×
Vauxhall Antara43,0321.32%2.63×
Vauxhall Insignia417,1251.15%2.38×
Vauxhall Zafira428,0122.53%2.19×
Vauxhall Astra1,346,0242.17%1.98×
Vauxhall Vectra68,3543.18%1.64×
Vauxhall Meriva192,4141.91%1.47×
Vauxhall Corsa1,866,5401.42%1.40×
Vauxhall Tigra15,0293.15%1.39×
Vauxhall Astravan17,5861.73%1.36×
Vauxhall Adam118,3760.65%1.22×
Vauxhall Viva76,7380.30%1.11×
Vauxhall Agila73,0561.21%0.69×
Vauxhall Grandland128,1650.02%0.48×
Vauxhall Vivaro372,1790.23%0.44×
Vauxhall Movano10,1550.29%0.39×
Models with at least 10,000 MOT tests and 30 expected failures on this item. 2023–2024 DVSA data; 73 Auto analysis.

By age at test

The difference is largest at 3-4 years old: 0.09% of Vauxhall tests against 0.03% for comparable cars.

Vauxhall: share of MOT tests failing on Exhaust system: has a major leak of exhaust gases by age band, against comparable cars
Age (years)Vauxhall testsVauxhallComparable cars
3-4608,5760.09%0.03%
5-6788,4190.39%0.15%
7-81,046,1930.80%0.39%
9-10972,3801.54%0.81%
11-12774,0981.88%1.21%
13-15894,8622.77%1.80%
16+736,0603.51%2.17%

Other Vauxhall MOT faults that stand out

Limitations

Official data: DVSA's anonymised MOT results (2023–2024), class 4 initial tests, cars at least 2.5 years old. 73 Auto analysis: the comparison rate applies the national rate of this item for each test's own age, mileage band and fuel to the Vauxhall tests. An MOT result reflects maintenance, mileage and how a car is used as well as its design, so this is not a measure of which make is most reliable. The wording of the defect is DVSA's.

Has this Vauxhall failed on it before?

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UK number plate or 17-character VIN

Where these figures come from

Figures labelled as 73 Auto estimates are our own analysis of these sources, set out in the methodology and data sources. To report a factual error, see corrections.