The picture
Grand Cherokee: a below-average pass rate worth digging into
Across 2,590 MOT tests, the Grand Cherokee returns 69.5% first-time pass — well below the UK fleet average. The single most-logged Major fail is a number-plate lamp out. The strength or continuity of the load bearing and windscreen damage round out the top three. Average tested mileage sits at 116,727, 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 rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
178 occurrences · 6.9% of tests
- 02
The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired
113 occurrences · 4.4% of tests
- 03
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
94 occurrences · 3.6% of tests
- 04
A transmission shaft constant velocity joint boot severely deteriorated
82 occurrences · 3.2% of tests
- 05
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
81 occurrences · 3.1% of tests
- 06
A suspension pin, bush or joint excessively worn
78 occurrences · 3.0% of tests
- 07
Headlamp reflector or lens slightly defective
73 occurrences · 2.8% of tests
- 08
The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired
63 occurrences · 2.4% of tests
- 09
a brake lining or pad worn below 1.5mm
60 occurrences · 2.3% of tests
- 10
A battery insecure but not likely to fall from carrier
57 occurrences · 2.2% 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.
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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 Grand Cherokee?
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 Grand Cherokee 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.