Isuzu D-Max Dl20 MOT pass rate & common failures
Across 3 model years and 2,053 tests, the Isuzu D-Max Dl20 passes its MOT 87.6% of the time. That is 4.0 percentage points worse than all cars of a similar age, which fail at 8.5%. Its most common failure areas are lighting & signalling, tyres and suspension.
What the MOT record shows
No single area dominates — lighting & signalling (6.3%) and tyres (4.0%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are shock absorbers, headlamp aim and wipers — shock absorbers alone was recorded 87 times.
A 120-150k example is materially riskier than a 0-30k one: 23.1% versus 7.9%.
Tyres is the most common advisory, noted on 20.4% of tests — work that passed today but is likely due soon.
How it compares
By model year
Every D-Max Dl20 model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 2021 | 1,317 | 87.0% | 13.0% | Lighting & signalling |
| 2022 | 717 | 88.4% | 11.6% | Lighting & signalling |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 6.3% | 129 |
| 2 | Tyres | 4.0% | 81 |
| 3 | Suspension | 3.4% | 70 |
| 4 | Visibility | 3.2% | 66 |
| 5 | Brakes | 3.2% | 65 |
| 6 | Emissions & environmental | 2.2% | 46 |
| 7 | Body, structure & corrosion | 0.8% | 16 |
| 8 | Seat belts & restraints | 0.6% | 13 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Shock absorbers | 87 |
| 2 | Headlamp aim | 77 |
| 3 | Wipers | 66 |
| 4 | Malfunction indicator lamp | 46 |
| 5 | Position lamp | 36 |
| 6 | Tread depth | 36 |
| 7 | Brake pads | 29 |
| 8 | Stop lamp | 26 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 20.4% | 419 |
| 2 | Brakes | 11.6% | 238 |
| 3 | Other defects | 6.7% | 138 |
| 4 | Visibility | 5.2% | 107 |
| 5 | Suspension | 4.2% | 86 |
| 6 | Lighting & signalling | 3.5% | 71 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 656 | 7.9% |
| 30-60k | 881 | 14.9% |
| 60-90k | 336 | 12.8% |
| 90-120k | 108 | 12.0% |
| 120-150k | 52 | 23.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 668 | 14.5% |
| 2025 | 1,381 | 11.4% |
What to check before buying a Isuzu D-Max Dl20
- Lighting & signalling (6.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Tyres (4.0% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Suspension (3.4% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
What is the MOT pass rate for the Isuzu D-Max Dl20?
87.6% of the 2,053 Isuzu D-Max Dl20 MOT tests in this dataset passed, a 12.4% fail rate, across model years 2021–2023.
What does the Isuzu D-Max Dl20 most often fail its MOT on?
Lighting & signalling, recorded in 6.3% of tests, then tyres (4.0%).
How much does mileage affect D-Max Dl20 MOT results?
Fail rates run at 7.9% for cars in the 0-30k band and 23.1% for 120-150k, a 15.2-point difference.
Methodology & source. Based on 2,053 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.