The picture
W650: a strong MOT record by UK norms
Across 703 MOT tests, the W650 returns 89.0% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is lamp missing or inoperative. Rate of flashing not between 60 and a stop-lamp out round out the top three. Average tested mileage sits at 21,349, 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 lamp missing or inoperative
5 occurrences · 0.7% of tests
- 02
Rate of flashing not between 60 and 120 times per minute
5 occurrences · 0.7% of tests
- 03
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
4 occurrences · 0.6% of tests
- 04
Tyre tread depth not in accordance with the requirements
4 occurrences · 0.6% of tests
- 05
Significant brake effort recorded with no brake applied indicating a binding brake
2 occurrences · 0.3% of tests
- 06
The aim of a headlamp is not within limits laid down in the requirements
2 occurrences · 0.3% of tests
- 07
Fuel system leaking, or missing or ineffective filler cap
2 occurrences · 0.3% of tests
- 08
A stop lamp(s) does not illuminate by the operation of both brake controls or remains on when the brakes are released
2 occurrences · 0.3% of tests
- 09
Projected beam image is obviously incorrect
2 occurrences · 0.3% of tests
- 10
Number plate does not conform to the specified requirements
1 occurrences · 0.1% 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
£68–£130
If every one of this W650'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
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
Search Amazon UK
Buying or keeping a W650?
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 W650 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.