The picture
Ds4: a below-average pass rate worth digging into
Across 14,221 MOT tests, the Ds4 returns 67.4% first-time pass — well below the UK fleet average. The single most-logged Major fail is a number-plate lamp out. A broken or weak spring and a missing CV-joint boot round out the top three. Average tested mileage sits at 85,534, 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
1,563 occurrences · 11.0% of tests
- 02
A spring or spring component fractured or seriously weakened
1,050 occurrences · 7.4% of tests
- 03
A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc
965 occurrences · 6.8% of tests
- 04
Tyre tread depth not in accordance with the requirements
807 occurrences · 5.7% of tests
- 05
A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps
617 occurrences · 4.3% of tests
- 06
A transmission shaft constant velocity joint boot severely deteriorated
356 occurrences · 2.5% of tests
- 07
A suspension pin, bush or joint excessively worn
321 occurrences · 2.3% of tests
- 08
a brake lining or pad worn below 1.5mm
314 occurrences · 2.2% of tests
- 09
The aim of a headlamp is not within limits laid down in the requirements
290 occurrences · 2.0% of tests
- 10
A steering ball joint with excessive wear or free play
282 occurrences · 2.0% 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 4 failures
£156–£405
If every one of this Ds4'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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Build your own retest budget.
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.
Item 01 · Amazon UK
H7 / W21W bulb pack
A spare-bulb kit lives in the boot. Test morning is not the time to find your stop-lamp's gone.
Search Amazon UK
Item 02 · Amazon UK
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
Search Amazon UK
Buying or keeping a Ds4?
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 Ds4 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.