2005 Mazda 3 — MOT failures & pass rate
Across 22,458 MOT tests analysed for the 2005 Mazda 3, the most common recorded failure areas were lighting & signalling, suspension and tyres. Its pass rate of 69.0% was below the average for small family cars of a similar age (72.1%). Higher-mileage examples failed more often — 38.4% in the 150k+ group versus 15.9% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 21.5% | 4,824 |
| 2 | Suspension | 19.3% | 4,335 |
| 3 | Tyres | 7.2% | 1,621 |
| 4 | Brakes | 7.1% | 1,600 |
| 5 | Emissions & environmental | 6.6% | 1,489 |
| 6 | Body, structure & corrosion | 5.9% | 1,329 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Position lamp | 2,041 |
| 2 | Headlamp | 1,940 |
| 3 | Headlamp aim | 1,851 |
| 4 | Component mounting prescribed areas | 1,817 |
| 5 | Pins and bushes | 1,684 |
| 6 | Stop lamp | 1,254 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 46.1% | 10,355 |
| 2 | Tyres | 31.6% | 7,098 |
| 3 | Brakes | 25.5% | 5,727 |
| 4 | Lighting & signalling | 20.8% | 4,682 |
| 5 | Body, structure & corrosion | 18.2% | 4,097 |
| 6 | Other defects | 14.4% | 3,241 |
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 | 145 | 15.9% |
| 30-60k | 1,903 | 21.2% |
| 60-90k | 5,666 | 26.9% |
| 90-120k | 7,779 | 32.3% |
| 120-150k | 4,988 | 35.1% |
| 150k+ | 1,972 | 38.4% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 21,881 | 31.0% |
| Diesel | 574 | 34.2% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 6,758 | 30.5% |
| 2022 | 5,436 | 31.4% |
| 2023 | 4,347 | 31.0% |
| 2024 | 3,380 | 31.1% |
| 2025 | 2,537 | 31.9% |
What to check before buying a 2005 3
Before buying a 2005 Mazda 3, focus on the areas it most often fails on. Lighting & signalling accounted for 21.5% of tests for this year.
- Lighting & signalling (21.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (19.3% 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.
- Tyres (7.2% 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.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2005 Mazda 3s pass their MOT?
69.0% of the 22,458 2005 Mazda 3 MOT tests in this dataset passed — a 31.1% fail rate.
What is the most common MOT failure on a 2005 Mazda 3?
Lighting & signalling, recorded in 21.5% of tests, followed by suspension (19.3%).
Does the 2005 3 get worse with mileage?
Its MOT fail rate rises from 15.9% in the 0-30k band to 38.4% in the 150k+ band.
Methodology & source. Based on 22,458 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.