The picture
Jumbuck: a below-average pass rate worth digging into
Across 736 MOT tests, the Jumbuck returns 64.4% first-time pass — well below the UK fleet average. The single most-logged Major fail is the strength or continuity of the load bearing. The strength or continuity of the load bearing and structural corrosion round out the top three. Average tested mileage sits at 71,932, 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
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
92 occurrences · 12.5% of tests
- 02
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
48 occurrences · 6.5% of tests
- 03
Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced
39 occurrences · 5.3% of tests
- 04
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
34 occurrences · 4.6% of tests
- 05
Brake pipe damaged or excessively corroded
33 occurrences · 4.5% of tests
- 06
Lambda coefficient outside the default limits or the range specified by the manufacturer
32 occurrences · 4.3% of tests
- 07
Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc
29 occurrences · 3.9% of tests
- 08
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
27 occurrences · 3.7% of tests
- 09
A battery insecure but not likely to fall from carrier
24 occurrences · 3.3% of tests
- 10
Brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle.
23 occurrences · 3.1% 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
£108–£305
If every one of this Jumbuck'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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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 Jumbuck?
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 Jumbuck 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.