2005 Mazda MX-5 — MOT failures & pass rate
The 2005 Mazda MX-5 passed 74.8% of its 21,960 recorded MOT tests. Against coupes & convertibles of a similar age (22.2% fail rate), the 2005 MX-5 comes out 2.9pp worse. Failures cluster in suspension, brakes and lighting & signalling.
What the MOT record shows
No single area dominates — suspension (10.3%) and brakes (9.8%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are component mounting prescribed areas, prescribed areas and catalyst emissions — component mounting prescribed areas alone was recorded 1,934 times.
Mileage is the strongest signal on the record: 11.1% of 0-30k cars fail, rising to 29.3% once past 150k — 2.6× the risk.
Advisories point at the next bill rather than this one: brakes was flagged on 28.5% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 10.3% | 2,273 |
| 2 | Brakes | 9.8% | 2,164 |
| 3 | Lighting & signalling | 9.4% | 2,062 |
| 4 | Emissions & environmental | 6.1% | 1,344 |
| 5 | Body, structure & corrosion | 5.7% | 1,250 |
| 6 | Visibility | 4.0% | 888 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Component mounting prescribed areas | 1,934 |
| 2 | Prescribed areas | 1,298 |
| 3 | Catalyst emissions | 1,235 |
| 4 | Service brake performance | 1,024 |
| 5 | Integral vehicle structure condition | 939 |
| 6 | Position lamp | 830 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 28.5% | 6,261 |
| 2 | Suspension | 28.5% | 6,251 |
| 3 | Tyres | 16.9% | 3,717 |
| 4 | Body, structure & corrosion | 13.9% | 3,049 |
| 5 | Emissions & environmental | 8.4% | 1,841 |
| 6 | Lighting & signalling | 7.5% | 1,641 |
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 | 1,094 | 11.1% |
| 30-60k | 5,714 | 19.2% |
| 60-90k | 8,400 | 26.8% |
| 90-120k | 4,480 | 30.2% |
| 120-150k | 1,481 | 32.1% |
| 150k+ | 772 | 29.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 5,224 | 25.3% |
| 2022 | 4,847 | 24.9% |
| 2023 | 4,435 | 25.3% |
| 2024 | 3,909 | 25.8% |
| 2025 | 3,545 | 24.4% |
What to check before buying a 2005 MX-5
On a 2005 MX-5, suspension is what the MOT record says goes wrong most — it appeared in 10.3% of tests. Check these areas before you commit.
- Suspension (10.3% 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.
- Brakes (9.8% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
- Lighting & signalling (9.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
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 MX-5s pass their MOT?
74.8% of the 21,960 2005 Mazda MX-5 MOT tests in this dataset passed — a 25.2% fail rate.
What is the most common MOT failure on a 2005 Mazda MX-5?
Suspension, recorded in 10.3% of tests, followed by brakes (9.8%).
Does the 2005 MX-5 get worse with mileage?
Its MOT fail rate rises from 11.1% in the 0-30k band to 29.3% in the 150k+ band.
Methodology & source. Based on 21,960 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.