The picture
Mulsanne: a strong MOT record by UK norms
Across 988 MOT tests, the Mulsanne returns 92.3% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is parking brake efficiency less than 50% of the. Windscreen damage and a number-plate lamp out round out the top three. Average tested mileage sits at 41,605, 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
Parking brake efficiency less than 50% of the required value
7 occurrences · 0.7% of tests
- 02
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
7 occurrences · 0.7% of tests
- 03
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
7 occurrences · 0.7% of tests
- 04
Parking brake efficiency below minimum requirement
6 occurrences · 0.6% of tests
- 05
Parking brake inoperative on one side
5 occurrences · 0.5% of tests
- 06
A spring or spring component fractured or seriously weakened
5 occurrences · 0.5% of tests
- 07
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
5 occurrences · 0.5% of tests
- 08
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
5 occurrences · 0.5% of tests
- 09
a brake lining or pad worn below 1.5mm
4 occurrences · 0.4% of tests
- 10
Wiper blade defective
4 occurrences · 0.4% 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.
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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 Mulsanne?
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 Mulsanne 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.