How reliable is the Lexus RX450H compared with other cars?

We do not publish a comparison for the Lexus RX450H, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 75.1% across 6,820 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.

What do testers most often warn about on a Lexus RX450H?

The most common advisory is "A suspension pin, bush or joint excessively worn", noted on 39.8% of all Lexus RX450H tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Lexus RX450H usually have at its MOT?

The average odometer reading recorded at test is 118,909 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

Model reliability file

Lexus RX450H MOT pass rate & common failures

From 6,820 recorded MOT tests of the Lexus RX450H, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 6,820 MOT tests, 75.1% of Lexus RX450H tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Lexus RX450H fleet does not yet cover a wide enough spread of ages and distances to compare it fairly against other models. Its most commonly recorded failure is lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, which appears in 28.0% of failed tests. Cars of this model average 118,909 miles on the odometer when tested.

At a glance

Recorded pass rate

75.1%unadjusted, not comparable6,820 tests

We are not publishing a ranking for the RX450H. The examples tested do not cover a wide enough spread of ages and mileages to compare it fairly, and an unadjusted pass rate mostly sorts models by how recently they were bought rather than how well they were built. The failure and advisory patterns below come from the same 6,820 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

Share of failed Lexus RX450H tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning28.0%
362 occurrencesLamp not working explained
2.A suspension joint dust cover missing or no longer prevents the ingress of dirt etc16.3%
211 occurrencesSuspension joint dust cover missing or split explained
3.Tyre tread depth not in accordance with the requirements12.5%
161 occurrencesTyre worn close to the legal limit explained
4.A suspension pin, bush or joint excessively worn12.5%
161 occurrencesSuspension arm bush worn explained
5.A shock absorber damaged to the extent that it does not function or showing signs of severe leakage12.3%
159 occurrencesShock absorber defective explained
6.A brake lining or pad worn below 1.5mm10.8%
140 occurrencesBrake drum or shoe worn or contaminated explained
7.A tyre cords visible or damaged9.6%
124 occurrencesTyre ply or cord exposed, or the casing separating explained
8.A tyre seriously damaged8.6%
111 occurrencesTyre damaged or deteriorated explained
9.A spring or spring component fractured or seriously weakened7.4%
95 occurrencesRoad spring broken or fractured explained
10.A suspension joint dust cover missing or no longer prevents the ingress of dirt etc6.0%
78 occurrencesSuspension joint dust cover missing or split explained

Warnings without a failure

Most common advisories

Share of all Lexus RX450H tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.A suspension pin, bush or joint excessively worn39.8%
2,711 testsSuspension arm bush worn explained
2.Tyre tread depth not in accordance with the requirements26.9%
1,832 testsTyre worn close to the legal limit explained
3.Brake disc or drum excessively weakened, insecure or fractured12.3%
839 testsBrake disc worn, pitted or scored explained
4.A brake lining or pad worn below 1.5mm10.9%
744 testsBrake drum or shoe worn or contaminated explained
5.A tyre seriously damaged9.6%
656 testsTyre damaged or deteriorated explained
6.A shock absorber damaged to the extent that it does not function or showing signs of severe leakage9.5%
647 testsShock absorber defective explained
7.A suspension component excessively damaged or corroded7.1%
486 testsSuspension mounting corroded or insecure explained
8.Fuel Pipe/s corroded3.9%
265 testsCorrosion in a structural area explained

What gets tested

The RX450H fleet

Average mileage recorded at test: 118,909
Fuel mix of tested cars: Hybrid100.0%

Check a specific Lexus RX450H

A model average tells you the pattern. Its own MOT record tells you the car.

Compare within the range

Other Lexus models

Lexus NX — 89.3% adjusted
Lexus CT — 85.0% adjusted
Lexus RX — 88.2% adjusted
Lexus UX — 93.7% unadjusted
Lexus IS — 84.3% adjusted
Lexus IS250 — 73.7% unadjusted
All Lexus models

Common questions

How reliable is the Lexus RX450H compared with other cars?: We do not publish a comparison for the Lexus RX450H, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 75.1% across 6,820 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.
What is the most common MOT failure on a Lexus RX450H?: The item recorded most often is "A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning", which appears in 28.0% of failed Lexus RX450H tests. Because one failed test can list several items, these shares do not add up to 100%.
What do testers most often warn about on a Lexus RX450H?: The most common advisory is "A suspension pin, bush or joint excessively worn", noted on 39.8% of all Lexus RX450H tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Lexus RX450H usually have at its MOT?: The average odometer reading recorded at test is 118,909 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

How this was worked out

Method and limits

Figures come from the DVSA anonymised MOT testing dataset, published under the Open Government Licence. Only class 4 initial tests are counted: retests are excluded so a car appears once, and abandoned tests are excluded entirely. No adjusted rate is shown because this model's tested examples do not cover enough of the national age and mileage range for standardisation to mean anything.

An MOT measures whether a car met a legal standard on the day. It is not a breakdown record, a service history or a running-cost estimate, and a pass rate is a property of a fleet rather than a prediction about one car.