The picture
Barchetta: middle-of-the-pack on first-time pass
Across 537 MOT tests, the Barchetta returns 74.9% first-time pass — below the UK fleet average. The single most-logged Major fail is a missing CV-joint boot. A weak handbrake and a split CV-joint boot round out the top three. Average tested mileage sits at 69,375, 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 transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc
24 occurrences · 4.5% of tests
- 02
Parking brake efficiency below minimum requirement
22 occurrences · 4.1% of tests
- 03
A transmission shaft constant velocity joint boot severely deteriorated
22 occurrences · 4.1% of tests
- 04
Headlamp reflector or lens slightly defective
17 occurrences · 3.2% of tests
- 05
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
16 occurrences · 3.0% of tests
- 06
Brake pipe damaged or excessively corroded
12 occurrences · 2.2% of tests
- 07
Lambda coefficient outside the default limits or the range specified by the manufacturer
12 occurrences · 2.2% of tests
- 08
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.
11 occurrences · 2.0% of tests
- 09
Wiper blade missing or obviously not clearing the windscreen
11 occurrences · 2.0% of tests
- 10
Wiper blade defective
10 occurrences · 1.9% 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.
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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 Barchetta?
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 Barchetta 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.