The picture
Monaro: above-average pass rates, with caveats
Across 486 MOT tests, the Monaro returns 82.5% first-time pass — above the UK fleet average. The single most-logged Major fail is a corroded brake pipe. A torn suspension dust cover and a worn steering ball joint round out the top three. Average tested mileage sits at 75,233, 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
Brake pipe damaged or excessively corroded
19 occurrences · 3.9% of tests
- 02
A suspension joint dust cover severely deteriorated
16 occurrences · 3.3% of tests
- 03
A steering ball joint with excessive wear or free play
12 occurrences · 2.5% of tests
- 04
A suspension joint dust cover missing or no longer prevents the ingress of dirt etc
9 occurrences · 1.9% of tests
- 05
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
7 occurrences · 1.4% of tests
- 06
A battery insecure but not likely to fall from carrier
7 occurrences · 1.4% of tests
- 07
A tyre cords visible or damaged
7 occurrences · 1.4% of tests
- 08
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
7 occurrences · 1.4% of tests
- 09
The aim of a headlamp is not within limits laid down in the requirements
6 occurrences · 1.2% of tests
- 10
Steering rack gaiter or ball joint dust cover damaged or deteriorated
5 occurrences · 1.0% 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
£280–£810
If every one of this Monaro'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.
Buying or keeping a Monaro?
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 Monaro 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.