The picture
Cabriolet: middle-of-the-pack on first-time pass
Across 1,447 MOT tests, the Cabriolet returns 71.4% first-time pass — below the UK fleet average. The single most-logged Major fail is a split CV-joint boot. A missing CV-joint boot and a number-plate lamp out round out the top three. Average tested mileage sits at 105,248, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
Top ten reasons for rejection.
- 01
A transmission shaft constant velocity joint boot severely deteriorated
92 occurrences · 6.4% of tests
- 02
A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc
60 occurrences · 4.1% of tests
- 03
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
52 occurrences · 3.6% of tests
- 04
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
48 occurrences · 3.3% of tests
- 05
A suspension pin, bush or joint excessively worn
45 occurrences · 3.1% of tests
- 06
Emissions levels exceed the manufacturer's specified limits
44 occurrences · 3.0% of tests
- 07
A battery insecure but not likely to fall from carrier
37 occurrences · 2.6% of tests
- 08
Lambda coefficient outside the default limits or the range specified by the manufacturer
35 occurrences · 2.4% of tests
- 09
A tyre seriously damaged
29 occurrences · 2.0% of tests
- 10
Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc
28 occurrences · 1.9% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 2 failures
£88–£275
If every one of this Cabriolet's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Tools that pre-empt a retest.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
Buying or keeping a Cabriolet?
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Cabriolet and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.