1990 Mazda MX-5 — MOT failures & pass rate
Across 3,712 MOT tests, the 1990 Mazda MX-5 recorded a 78.0% pass rate. Coupes & convertibles of a similar age fail 18.0% of the time, so this is 4.0pp worse than the group it competes with. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
No single area dominates — lighting & signalling (11.7%) and brakes (9.3%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, prescribed areas and component mounting prescribed areas — headlamp aim alone was recorded 187 times.
Mileage is the strongest signal on the record: 8.9% of 0-30k cars fail, rising to 25.8% once past 150k — 2.9× the risk.
Advisories point at the next bill rather than this one: brakes was flagged on 26.2% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.7% | 433 |
| 2 | Brakes | 9.3% | 345 |
| 3 | Suspension | 8.8% | 328 |
| 4 | Visibility | 4.9% | 180 |
| 5 | Body, structure & corrosion | 4.6% | 170 |
| 6 | Emissions & environmental | 3.6% | 135 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 187 |
| 2 | Prescribed areas | 184 |
| 3 | Component mounting prescribed areas | 170 |
| 4 | Rbt (sp) | 146 |
| 5 | Service brake performance | 136 |
| 6 | Wipers | 115 |
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 | 26.2% | 971 |
| 2 | Suspension | 24.1% | 894 |
| 3 | Emissions & environmental | 21.4% | 795 |
| 4 | Body, structure & corrosion | 12.6% | 469 |
| 5 | Tyres | 11.6% | 430 |
| 6 | Other defects | 6.7% | 247 |
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 | 101 | 8.9% |
| 30-60k | 302 | 14.6% |
| 60-90k | 672 | 18.8% |
| 90-120k | 1,117 | 21.3% |
| 120-150k | 922 | 26.6% |
| 150k+ | 596 | 25.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 693 | 22.5% |
| 2022 | 671 | 21.9% |
| 2023 | 627 | 20.3% |
| 2024 | 828 | 22.6% |
| 2025 | 893 | 22.5% |
What to check before buying a 1990 MX-5
On a 1990 MX-5, lighting & signalling is what the MOT record says goes wrong most — it appeared in 11.7% of tests. Check these areas before you commit.
- Lighting & signalling (11.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (9.3% 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.
- Suspension (8.8% 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
How many 1990 Mazda MX-5s pass their MOT?
78.0% of the 3,712 1990 Mazda MX-5 MOT tests in this dataset passed — a 22.0% fail rate.
What is the most common MOT failure on a 1990 Mazda MX-5?
Lighting & signalling, recorded in 11.7% of tests, followed by brakes (9.3%).
Does the 1990 MX-5 get worse with mileage?
Its MOT fail rate rises from 8.9% in the 0-30k band to 25.8% in the 150k+ band.
Methodology & source. Based on 3,712 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.