The picture
G310: a strong MOT record by UK norms
Across 1,286 MOT tests, the G310 returns 90.0% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is uneven braking force. Headlamp missing, inoperative and headlamp aim out of spec round out the top three. Average tested mileage sits at 5,656, 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
Excessive fluctuation in brake effort through each wheel revolution
7 occurrences · 0.5% of tests
- 02
A headlamp missing, inoperative or more than ½ not functioning in the case of LED
7 occurrences · 0.5% of tests
- 03
The aim of a headlamp is not within limits laid down in the requirements
6 occurrences · 0.5% of tests
- 04
A shock absorber not functioning or leaking severely
6 occurrences · 0.5% of tests
- 05
A stop lamp(s) does not illuminate by the operation of both brake controls or remains on when the brakes are released
6 occurrences · 0.5% of tests
- 06
A transmission belt, chain, sprocket or pulley excessively loose or worn
5 occurrences · 0.4% of tests
- 07
Brake lining or pad worn below 1.0mm
4 occurrences · 0.3% of tests
- 08
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
4 occurrences · 0.3% of tests
- 09
A transmission belt, chain, sprocket or pulley so loose or worn it is likely to fail
4 occurrences · 0.3% of tests
- 10
Exhaust noise levels in excess of those permitted
4 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 3 failures
£28–£195
If every one of this G310'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
Headlight restoration kit
Yellowed lenses fail the light-output test. A restoration kit lifts the haze in an afternoon for £20.
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 G310?
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 G310 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.