The picture
500x Sport: a strong MOT record by UK norms
Across 528 MOT tests, the 500x Sport returns 89.2% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a seriously damaged tyre. Tyre tread under the limit and a tyre with the cords showing round out the top three. Average tested mileage sits at 21,433, 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 tyre seriously damaged
11 occurrences · 2.1% of tests
- 02
Tyre tread depth not in accordance with the requirements
9 occurrences · 1.7% of tests
- 03
A tyre cords visible or damaged
8 occurrences · 1.5% of tests
- 04
Lambda coefficient outside the default limits or the range specified by the manufacturer
8 occurrences · 1.5% of tests
- 05
A tyre seriously damaged
6 occurrences · 1.1% of tests
- 06
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
3 occurrences · 0.6% of tests
- 07
Wiper blade defective
2 occurrences · 0.4% of tests
- 08
The aim of a headlamp is not within limits laid down in the requirements
2 occurrences · 0.4% of tests
- 09
A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
2 occurrences · 0.4% of tests
- 10
Engine MIL illuminated indicating a malfunction
2 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.
Worst-case fix budget · top 2 failures
£120–£190
If every one of this 500x Sport'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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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 500x Sport?
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 500x Sport 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.