The picture
G-Class: above-average pass rates, with caveats
Across 1,573 MOT tests, the G-Class returns 84.9% first-time pass — above the UK fleet average. The single most-logged Major fail is a broken or weak spring. Windscreen damage and a seriously damaged tyre round out the top three. Average tested mileage sits at 49,755, 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 spring or spring component fractured or seriously weakened
30 occurrences · 1.9% of tests
- 02
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
29 occurrences · 1.8% of tests
- 03
A tyre seriously damaged
27 occurrences · 1.7% of tests
- 04
Steering rack gaiter or ball joint dust cover damaged or deteriorated
26 occurrences · 1.7% of tests
- 05
Number plate does not conform to the specified requirements
21 occurrences · 1.3% of tests
- 06
Wiper blade missing or obviously not clearing the windscreen
21 occurrences · 1.3% of tests
- 07
The aim of a headlamp is not within limits laid down in the requirements
19 occurrences · 1.2% of tests
- 08
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
17 occurrences · 1.1% of tests
- 09
a brake lining or pad worn below 1.5mm
14 occurrences · 0.9% of tests
- 10
Wiper blade defective
13 occurrences · 0.8% 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
£175–£515
If every one of this G Class'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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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.
Buying or keeping a G Class?
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 G Class 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.