Morgan
4/4
3,154 MOT tests analysed. sits above the UK fleet average — here's where 4/4s pass, fail, and end up on the retest sheet.
That's 10.1 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
87.6%
Pass-after-fix
2.6%
Fail
9.4%
Avg miles
32,022
Pass + Pass-after-fix + Fail = 100%
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The picture
4/4: a strong MOT record by UK norms
Across 2,128 MOT tests, the 4/4 returns 86.6% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a binding brake. Brakes imbalance across an axle such and windscreen damage round out the top three. Average tested mileage sits at 32,019, 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.
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- 01
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
32 occurrences · 1.0% of tests
- 02
Significant brake effort recorded with no brake applied indicating a binding brake
28 occurrences · 0.9% of tests
- 03
An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
26 occurrences · 0.8% of tests
- 04
Wiper blade defective
26 occurrences · 0.8% of tests
- 05
Lambda coefficient outside the default limits or the range specified by the manufacturer
23 occurrences · 0.7% of tests
- 06
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.
22 occurrences · 0.7% of tests
- 07
Steering rack gaiter or ball joint dust cover damaged or deteriorated
22 occurrences · 0.7% of tests
- 08
Stop lamps all missing or inoperative
21 occurrences · 0.7% of tests
- 09
Brake pedal anti-slip provision missing, loose or worn smooth
17 occurrences · 0.5% of tests
- 10
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
17 occurrences · 0.5% 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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Buying or keeping a 4/4?
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 4/4 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.