The picture
Roadster: above-average pass rates, with caveats
Across 3,093 MOT tests, the Roadster returns 81.6% first-time pass — above the UK fleet average. The single most-logged Major fail is a number-plate lamp out. Stop lamp with a multiple light source up and windscreen damage round out the top three. Average tested mileage sits at 48,757, 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 rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
98 occurrences · 3.2% of tests
- 02
Stop lamp with a multiple light source up to 1/2 not functioning
77 occurrences · 2.5% of tests
- 03
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
62 occurrences · 2.0% of tests
- 04
Wiper blade missing or obviously not clearing the windscreen
51 occurrences · 1.6% of tests
- 05
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
48 occurrences · 1.6% of tests
- 06
Tyre tread depth not in accordance with the requirements
47 occurrences · 1.5% of tests
- 07
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
45 occurrences · 1.5% of tests
- 08
A tyre seriously damaged
44 occurrences · 1.4% of tests
- 09
A tyre seriously damaged
37 occurrences · 1.2% of tests
- 10
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
30 occurrences · 1.0% 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 3 failures
£36–£115
If every one of this Roadster'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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Build your own retest budget.
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.
Item 01 · Amazon UK
H7 / W21W bulb pack
A spare-bulb kit lives in the boot. Test morning is not the time to find your stop-lamp's gone.
Search Amazon UK
Item 02 · Amazon UK
Bosch Aerotwin wiper blades
Cheap wipers fail the test on smear streaks. Bosch Aerotwins last a winter and clear a screen properly.
Search Amazon UK
Buying or keeping a Roadster?
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 Roadster 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.