The picture
Serena: middle-of-the-pack on first-time pass
Across 2,468 MOT tests, the Serena returns 77.5% first-time pass — roughly in line with the UK fleet average. The single most-logged Major fail is a torn steering gaiter. A defective headlamp lens and brake pads worn below 1.5 mm round out the top three. Average tested mileage sits at 87,572, 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
Steering rack gaiter or ball joint dust cover damaged or deteriorated
138 occurrences · 5.6% of tests
- 02
Headlamp reflector or lens slightly defective
103 occurrences · 4.2% of tests
- 03
a brake lining or pad worn below 1.5mm
66 occurrences · 2.7% of tests
- 04
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
63 occurrences · 2.6% of tests
- 05
Tyre tread depth not in accordance with the requirements
59 occurrences · 2.4% of tests
- 06
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
54 occurrences · 2.2% of tests
- 07
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
53 occurrences · 2.1% of tests
- 08
Wiper blade defective
47 occurrences · 1.9% of tests
- 09
Wiper blade missing or obviously not clearing the windscreen
47 occurrences · 1.9% of tests
- 10
A steering ball joint with excessive wear or free play
37 occurrences · 1.5% 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.
Worst-case fix budget · top 5 failures
£238–£610
If every one of this Serena'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 →
Try the calculator
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
Headlight restoration kit
Yellowed lenses fail the light-output test. A restoration kit lifts the haze in an afternoon for £20.
Search Amazon UK
Item 02 · Amazon UK
Brake pad measurement gauge
Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.
Search Amazon UK
Item 03 · 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
Buying or keeping a Serena?
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 Serena 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.