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1,708 tests in 2025

Toyota Bz4x reliability and MOT pass rate

98% passed first time. The 2% fail rate is 20.6 points better than the all-car average, on a median example 1 years old with 25,221 miles.

MOT pass rates / Toyota

Pass rate

98%

22.6% of all cars failed; 2% of these did.

Fixed on the day

0.9%

Passed after a defect was put right during the visit.

Median at test

25,221 mi

1 years old.

Fail rate by age

Age at testTestsFail rate
3-5 years4063.7%
6-9 years0—
10-13 years0—
14+ years0—

What the Bz4x fails on

Share of failed tests with at least one fail item in each DVSA inspection section. A test can fail in several sections at once.

  1. Tyres11 dangerous71.4%
  2. Lamps, reflectors and electrical equipment1 dangerous14.3%
  3. Suspension5.7%
  4. Brakes2.9%
  5. Seat belts and supplementary restraint systems2.9%
  6. Visibility2.9%

The exact defects that fail it

Every failure item DVSA recorded against a Bz4x in 2025, counted by how many tests each one appeared on.

  1. 1Condition: has a cut in excess of the requirements deep enough to reach the ply or cords12 tests
  2. 2Tread depth: tread depth below requirements of 1.6mm6 tests
  3. 3Condition: has ply or cords exposed4 tests
  4. 4Ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt1 tests
  5. 5Condition: webbing significantly weakened cut greater than 4mm1 tests
  6. 6Headlamp aim: too low1 tests
  7. 7Headlamp cleaning device: for LED or HID headlamp inoperative1 tests
  8. 8Horn: not working1 tests

What wears out first

Advisories are the tester flagging wear that is still legal. A typical Bz4x collects 1.47 of them per test, and these are the ones that come up most. Treat it as the running-repairs list for the next year or two.

  1. 1Tread depth: tread depth below requirements of 1.6mm133 tests
  2. 2Non-component advisories: Nail in tyre45 tests
  3. 3Tread depth: tread pattern not visible over the whole tread area when minimum depth required is 1.0mm28 tests
  4. 4Brake discs: in such a condition that it is seriously weakened22 tests
  5. 5Condition: has a tear, caused by separation or partial failure of its structure20 tests
  6. 6Condition: has a cut in excess of the requirements deep enough to reach the ply or cords16 tests
  7. 7Non-component advisories: Items removed from drivers view prior to test9 tests
  8. 8Brake pads: less than 1.5 mm thick8 tests

Questions

What is the Toyota Bz4x MOT pass rate?

98% of the 1,708 Toyota Bz4x first-attempt MOTs in 2025 passed. The fail rate of 2% compares with 22.6% across all cars. A further 0.9% passed after a defect was fixed during the test visit.

What does a Toyota Bz4x usually fail on?

The single most common failure is "Condition: has a cut in excess of the requirements deep enough to reach the ply or cords", recorded on 12 failed tests, followed by "Tread depth: tread depth below requirements of 1.6mm" and "Condition: has ply or cords exposed". By section, tyres appears in 71.4% of failures, lamps, reflectors and electrical equipment appears in 14.3% of failures, suspension appears in 5.7% of failures.

Does age change the odds?

Sharply. At 3 to 5 years old the fail rate was 3.7%; at 3-5 years it was 3.7%. The median Toyota Bz4x tested in 2025 was 1 years old with 25,221 miles.

First-attempt class 4 tests, 2025, from DVSA’s anonymised MOT data (OGL v3, retrieved 2026-09-12). DVSA records newer cars trim by trim; this page adds every Bz4x trim together. Year-on-year figures come from the same DVSA extracts for 2026 and earlier years. Full method on the pass rates hub.

DVSA has published 8 safety recalls naming the Toyota Bz4x: Toyota Bz4x recalls.

Other Toyota models

Checking a particular Bz4x?

The odds above are the model. The car in front of you has its own record: every test, every advisory, the mileage at each one.

Due a test? Find an approved MOT station near you.