1,537 tests in 2025
Isuzu Tf reliability and MOT pass rate
61% passed first time. The 39% fail rate is 16.4 points worse than the all-car average, on a median example 14 years old with 115,449 miles.
Pass rate
61%
22.6% of all cars failed; 39% of these did.
Fixed on the day
7.7%
Passed after a defect was put right during the visit.
Median at test
115,449 mi
14 years old.
Fail rate by age
| Age at test | Tests | Fail rate |
|---|---|---|
| 3-5 years | 0 | — |
| 6-9 years | 1 | — |
| 10-13 years | 307 | 40.1% |
| 14+ years | 1,229 | 38.6% |
What the Tf 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.
- Suspension39 dangerous58.6%
- Lamps, reflectors and electrical equipment11 dangerous54.9%
- Brakes60 dangerous36.1%
- Body, chassis, structure27 dangerous28.7%
- Visibility17.7%
- Tyres80 dangerous11.4%
- Noise, emissions and leaks8.2%
- Seat belts and supplementary restraint systems7.7%
Is the Tf getting worse?
The fail rate rose 5.8 points to 39.6% from 2022 to 2025 while the median one tested aged 3 years, which is about what ageing alone predicts (5.9 points). Read it as the fleet getting older rather than the model changing.
| Year | Tests | Median age | Fail rate | All cars | |
|---|---|---|---|---|---|
| 2022 | 1,777 | 11 | 33.8% | 22.5% | |
| 2023 | 1,654 | 12 | 36.5% | 22.8% | |
| 2024 | 1,375 | 13 | 36.9% | 23.2% | |
| 2025 | 1,270 | 14 | 39.6% | 22.6% |
Fail rate is first attempts at class 4 tests. Median age is the age of a typical Tf at its test that year, and it is the number to watch: across the whole fleet each extra year of age adds roughly 1.9 points to the fail rate, so a model whose age and fail rate rise together is simply getting older.
The exact defects that fail it
Every failure item DVSA recorded against a Tf in 2025, counted by how many tests each one appeared on.
- 1Position lamp: not working113 tests
- 2Ball joint: ball joint excessively worn94 tests
- 3Headlamp aim: projected beam image is obviously incorrect72 tests
- 4Shock absorbers: has an excessively worn bush70 tests
- 5Rear fog lamp: not working68 tests
- 6Rigid brake pipes: excessively corroded58 tests
- 7Leaf spring: fractured57 tests
- 8Ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt52 tests
What wears out first
Advisories are the tester flagging wear that is still legal. A typical Tf collects 3.4 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.
- 1Rigid brake pipes: excessively corroded346 tests
- 2Wheel bearings: has excessive play313 tests
- 3Tread depth: tread depth below requirements of 1.6mm216 tests
- 4Chassis condition: corroded to the extent that the rigidity of the assembly is significantly reduced150 tests
- 5Ball joint: ball joint excessively worn128 tests
- 6Shock absorbers: has an excessively worn bush115 tests
- 7Engine oil leaks: leaking excessively from engine102 tests
- 8Condition: has a tear, caused by separation or partial failure of its structure79 tests
Questions
What is the Isuzu Tf MOT pass rate?
61% of the 1,537 Isuzu Tf first-attempt MOTs in 2025 passed. The fail rate of 39% compares with 22.6% across all cars. A further 7.7% passed after a defect was fixed during the test visit.
What does a Isuzu Tf usually fail on?
The single most common failure is "Position lamp: not working", recorded on 113 failed tests, followed by "Ball joint: ball joint excessively worn" and "Headlamp aim: projected beam image is obviously incorrect". By section, suspension appears in 58.6% of failures, lamps, reflectors and electrical equipment appears in 54.9% of failures, brakes appears in 36.1% of failures.
Does age change the odds?
Sharply. At 3 to 5 years old the fail rate was n/a%; at 14+ years it was 38.6%. The median Isuzu Tf tested in 2025 was 14 years old with 115,449 miles.
Is the Isuzu Tf getting less reliable?
The fail rate rose 5.8 points to 39.6% from 2022 to 2025 while the median one tested aged 3 years, which is about what ageing alone predicts (5.9 points). Read it as the fleet getting older rather than the model changing.
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 Tf trim together. Year-on-year figures come from the same DVSA extracts for 2026 and earlier years. Full method on the pass rates hub.
Other Isuzu models
Checking a particular Tf?
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.