The picture
Rx450h: middle-of-the-pack on first-time pass
Across 8,185 MOT tests, the Rx450h returns 79.6% first-time pass — roughly in line with the UK fleet average. The single most-logged Major fail is a lamp out. Tyre tread under the limit and windscreen damage round out the top three. Average tested mileage sits at 109,009, 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 lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
288 occurrences · 3.5% of tests
- 02
Tyre tread depth not in accordance with the requirements
203 occurrences · 2.5% of tests
- 03
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
196 occurrences · 2.4% of tests
- 04
A suspension joint dust cover severely deteriorated
172 occurrences · 2.1% of tests
- 05
A lamp with a multiple light source up to 1/2 not functioning
168 occurrences · 2.1% of tests
- 06
A suspension joint dust cover severely deteriorated
160 occurrences · 2.0% of tests
- 07
A suspension joint dust cover missing or no longer prevents the ingress of dirt etc
145 occurrences · 1.8% of tests
- 08
a brake lining or pad worn below 1.5mm
130 occurrences · 1.6% of tests
- 09
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
129 occurrences · 1.6% of tests
- 10
A spring or spring component fractured or seriously weakened
119 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 2 failures
£140–£335
If every one of this Rx450h'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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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.
Buying or keeping a Rx450h?
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 Rx450h 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.