The picture
Nss: a strong MOT record by UK norms
Across 4,574 MOT tests, the Nss returns 88.0% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is brake pads worn below 1.0 mm. Tyre tread under the limit and stiff steering bearings round out the top three. Average tested mileage sits at 24,711, 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
Brake lining or pad worn below 1.0mm
130 occurrences · 2.8% of tests
- 02
Tyre tread depth not in accordance with the requirements
128 occurrences · 2.8% of tests
- 03
Steering head bearings excessively stiff, notchy, or with excessive wear or play
40 occurrences · 0.9% of tests
- 04
A shock absorber not functioning or leaking severely
29 occurrences · 0.6% of tests
- 05
A stop lamp(s) remains on when the brakes are released
21 occurrences · 0.5% of tests
- 06
Brake disc or drum significantly and obviously worn
19 occurrences · 0.4% of tests
- 07
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
19 occurrences · 0.4% of tests
- 08
Tyre tread depth not in accordance with the requirements
17 occurrences · 0.4% of tests
- 09
A stop lamp(s) does not illuminate by the operation of both brake controls or remains on when the brakes are released
17 occurrences · 0.4% of tests
- 10
Handlebar grip insecure to handlebar
15 occurrences · 0.3% 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 4 failures
£238–£480
If every one of this Nss'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
Brake pad measurement gauge
Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.
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
Item 03 · 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 Nss?
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 Nss 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.