The picture
Dyna: a below-average pass rate worth digging into
Across 2,384 MOT tests, the Dyna returns 67.7% first-time pass — well below the UK fleet average. The single most-logged Major fail is windscreen damage. Worn suspension bushes and a number-plate lamp out round out the top three. Average tested mileage sits at 118,977, 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
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
237 occurrences · 9.9% of tests
- 02
A suspension pin, bush or joint excessively worn
176 occurrences · 7.4% of tests
- 03
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
151 occurrences · 6.3% of tests
- 04
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
122 occurrences · 5.1% of tests
- 05
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.
106 occurrences · 4.4% of tests
- 06
Obligatory mirror or device slightly damaged or loose
85 occurrences · 3.6% of tests
- 07
Parking brake efficiency below minimum requirement
84 occurrences · 3.5% of tests
- 08
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
83 occurrences · 3.5% of tests
- 09
A shock absorber bush excessively worn
77 occurrences · 3.2% of tests
- 10
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
70 occurrences · 2.9% 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 2 failures
£88–£275
If every one of this Dyna'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 Dyna?
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 Dyna 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.