How reliable is the Toyota BZ4X compared with other cars?

We do not publish a comparison for the Toyota BZ4X, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages.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 97.2% across 1,631 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 Toyota BZ4X?

The item recorded most often is "A tyre seriously damaged", which appears in 39.4% of failed Toyota BZ4X 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 Toyota BZ4X?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 10.3% of all Toyota BZ4X tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Toyota BZ4X usually have at its MOT?

The average odometer reading recorded at test is 27,778 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

Toyota BZ4X MOT pass rate & common failures

From 1,631 recorded MOT tests of the Toyota BZ4X, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 1,631 MOT tests, 97.2% of Toyota BZ4X tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Toyota BZ4X 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 tyre seriously damaged, which appears in 39.4% of failed tests. Cars of this model average 27,778 miles on the odometer when tested.

At a glance

Recorded pass rate

97.2%unadjusted, not comparable1,631 tests

We are not publishing a ranking for the BZ4X. 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 1,631 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

Share of failed Toyota BZ4X tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.A tyre seriously damaged39.4%
13 occurrencesTyre damaged or deteriorated explained
2.Tyre tread depth not in accordance with the requirements24.2%
8 occurrencesTyre worn close to the legal limit explained
3.A tyre cords visible or damaged9.1%
3 occurrencesTyre ply or cord exposed, or the casing separating explained
4.A suspension joint dust cover missing or no longer prevents the ingress of dirt etc6.1%
2 occurrencesSuspension joint dust cover missing or split explained
5.Tyres on the same axle or on twin wheels are different sizes3.0%
1 occurrencesTyres of different sizes or construction on the same axle explained
6.Tyre tread depth not in accordance with the requirements3.0%
1 occurrencesTyre worn close to the legal limit explained
7.Wiper blade missing or obviously not clearing the windscreen3.0%
1 occurrencesWiper or washer not working properly explained
8.Tyres on the same axle or on twin wheels are different sizes3.0%
1 occurrencesTyres of different sizes or construction on the same axle explained
9.A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning3.0%
1 occurrencesDirection indicator not working explained
10.Unknown (32135)3.0%
1 occurrences

Warnings without a failure

Most common advisories

Share of all Toyota BZ4X 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 requirements10.3%
168 testsTyre worn close to the legal limit explained
2.Nail in tyre2.5%
41 tests
3.Tyre tread depth not in accordance with the requirements2.0%
32 testsTyre worn close to the legal limit explained
4.Brake disc or drum excessively weakened, insecure or fractured1.7%
28 testsBrake disc worn, pitted or scored explained
5.A tyre seriously damaged1.6%
26 testsTyre damaged or deteriorated explained
6.A tyre seriously damaged1.0%
17 testsTyre damaged or deteriorated explained
7.A brake lining or pad worn below 1.5mm0.7%
12 testsBrake drum or shoe worn or contaminated explained
8.Items removed from drivers view prior to test0.5%
8 tests

What gets tested

The BZ4X fleet

Average mileage recorded at test: 27,778
Fuel mix of tested cars: Electric100.0%

Trim names grouped into this model (4)

Recorded exactly as DVSA holds them. Trim-level names are rolled up so one model is not split across a dozen thin pages.

BZ4X MOTION
BZ4X MOTION AWD
BZ4X PREMIERE EDITION AWD
BZ4X PURE

Check a specific Toyota BZ4X

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

Compare within the range

Other Toyota models

Toyota Yaris — 72.3% adjusted
Toyota Aygo — 70.4% adjusted
Toyota Prius — 81.4% adjusted
Toyota Auris — 72.6% adjusted
Toyota Corolla — 78.8% adjusted
Toyota RAV4 — 79.0% adjusted
All Toyota models

Common questions

How reliable is the Toyota BZ4X compared with other cars?: We do not publish a comparison for the Toyota BZ4X, 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 97.2% across 1,631 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 Toyota BZ4X?: The item recorded most often is "A tyre seriously damaged", which appears in 39.4% of failed Toyota BZ4X 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 Toyota BZ4X?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 10.3% of all Toyota BZ4X tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Toyota BZ4X usually have at its MOT?: The average odometer reading recorded at test is 27,778 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.