The picture
Street Triple Rs: a strong MOT record by UK norms
Across 628 MOT tests, the Street Triple Rs returns 91.4% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a non-conforming number plate. A missing rear reflector and rear registration plate lamp throwing direct white round out the top three. Average tested mileage sits at 5,893, 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
Number plate does not conform to the specified requirements
6 occurrences · 1.0% of tests
- 02
Reflector missing or reflecting white to the rear
6 occurrences · 1.0% of tests
- 03
A rear registration plate lamp throwing direct white light to the rear
4 occurrences · 0.6% of tests
- 04
Excessive fluctuation in brake effort through each wheel revolution
2 occurrences · 0.3% of tests
- 05
Steering head bearings have excessive wear or play
2 occurrences · 0.3% of tests
- 06
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
2 occurrences · 0.3% of tests
- 07
A stop lamp switch does not operate in accordance with the requirements
2 occurrences · 0.3% of tests
- 08
Tyre tread depth not in accordance with the requirements
2 occurrences · 0.3% of tests
- 09
Exhaust noise levels in excess of those permitted
2 occurrences · 0.3% of tests
- 10
Brake lining or pad worn below 1.0mm
1 occurrences · 0.2% 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
£113–£260
If every one of this Street Triple RS'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 →
Try the calculator
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
MOT-spec replacement number plate
Faded or non-standard plates fail outright. Replacements take ten minutes online with V5C details.
Search Amazon UK
Item 02 · 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
Buying or keeping a Street Triple RS?
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 Street Triple RS 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.