How reliable is the Lexus LS430 compared with other cars?

We do not publish a comparison for the Lexus LS430, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages.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 75.4% across 1,000 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 LS430?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 22.8% of all Lexus LS430 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Lexus LS430 usually have at its MOT?

The average odometer reading recorded at test is 130,953 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.

Are most Lexus LS430 models petrol or diesel?

Of the Lexus LS430 cars tested, 98% are petrol, 2% are lpg. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

Model reliability file

Lexus LS430 MOT pass rate & common failures

From 1,000 recorded MOT tests of the Lexus LS430, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 1,000 MOT tests, 75.4% of Lexus LS430 tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Lexus LS430 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 13.1% of failed tests. Cars of this model average 130,953 miles on the odometer when tested.

At a glance

Recorded pass rate

75.4%unadjusted, not comparable1,000 tests

We are not publishing a ranking for the LS430. 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 1,000 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

Share of failed Lexus LS430 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 functioning13.1%
26 occurrencesLamp not working explained
2.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 repaired13.1%
26 occurrencesSuspension mounting corroded or insecure explained
3.A brake lining or pad worn below 1.5mm12.1%
24 occurrencesBrake drum or shoe worn or contaminated explained
4.Engine MIL illuminated indicating a malfunction11.6%
23 occurrencesEngine management light on, or not working explained
5.Brake pipe damaged or excessively corroded10.1%
20 occurrencesBrake pipe corroded explained
6.Lambda coefficient outside the default limits or the range specified by the manufacturer9.5%
19 occurrencesEmissions above the permitted limit explained
7.Parking brake efficiency less than 50% of the required value8.5%
17 occurrencesParking brake efficiency too low explained
8.Tyre tread depth not in accordance with the requirements8.0%
16 occurrencesTyre worn close to the legal limit explained
9.Wiper blade missing or obviously not clearing the windscreen8.0%
16 occurrencesWiper or washer not working properly explained
10.The aim of a headlamp is not within limits laid down in the requirements7.0%
14 occurrencesHeadlamp aim incorrect explained

Warnings without a failure

Most common advisories

Share of all Lexus LS430 tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.Tyre tread depth not in accordance with the requirements22.8%
228 testsTyre worn close to the legal limit explained
2.A suspension pin, bush or joint excessively worn16.5%
165 testsSuspension arm bush worn explained
3.A brake lining or pad worn below 1.5mm11.0%
110 testsBrake drum or shoe worn or contaminated explained
4.Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users9.6%
96 tests
5.A suspension component excessively damaged or corroded8.3%
83 testsSuspension mounting corroded or insecure explained
6.Exhaust system leaking or insecure7.9%
79 testsExhaust leaking or insecure explained
7.A suspension component excessively damaged or corroded7.8%
78 testsSuspension mounting corroded or insecure explained
8.Brake disc or drum excessively weakened, insecure or fractured7.6%
76 testsBrake disc worn, pitted or scored explained

What gets tested

The LS430 fleet

Average mileage recorded at test: 130,953
Fuel mix of tested cars: Petrol98.4%
LPG1.6%

Check a specific Lexus LS430

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 LS430 compared with other cars?: We do not publish a comparison for the Lexus LS430, 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 75.4% across 1,000 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 LS430?: 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 13.1% of failed Lexus LS430 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 LS430?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 22.8% of all Lexus LS430 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Lexus LS430 usually have at its MOT?: The average odometer reading recorded at test is 130,953 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.
Are most Lexus LS430 models petrol or diesel?: Of the Lexus LS430 cars tested, 98% are petrol, 2% are lpg. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

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.