1989 Austin Mini Thirty — MOT failures & pass rate
Across 1,393 MOT tests analysed for the 1989 Austin Mini Thirty, the most common recorded failure areas were lighting & signalling, emissions & environmental and suspension. Its pass rate of 77.3% was below the average for cars of a similar age (79.7%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 13.1% | 183 |
| 2 | Emissions & environmental | 10.2% | 142 |
| 3 | Suspension | 8.8% | 122 |
| 4 | Brakes | 7.2% | 100 |
| 5 | Body, structure & corrosion | 6.4% | 89 |
| 6 | Visibility | 6.0% | 84 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Non catalyst emissions | 150 |
| 2 | Headlamp | 70 |
| 3 | Headlamp aim | 66 |
| 4 | Service brake imbalance | 66 |
| 5 | Rear fog lamp | 56 |
| 6 | Service brake performance | 50 |
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 | 25.8% | 360 |
| 2 | Emissions & environmental | 18.1% | 252 |
| 3 | Brakes | 14.1% | 197 |
| 4 | Body, structure & corrosion | 10.7% | 149 |
| 5 | Tyres | 10.5% | 146 |
| 6 | Other defects | 4.7% | 65 |
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 | 291 | 19.2% |
| 30-60k | 414 | 24.6% |
| 60-90k | 557 | 23.2% |
| 90-120k | 130 | 22.3% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 298 | 24.8% |
| 2022 | 276 | 20.3% |
| 2023 | 287 | 22.7% |
| 2024 | 278 | 23.4% |
| 2025 | 254 | 22.1% |
What to check before buying a 1989 Mini Thirty
Before buying a 1989 Austin Mini Thirty, focus on the areas it most often fails on. Lighting & signalling accounted for 13.1% of tests for this year.
- Lighting & signalling (13.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Emissions & environmental (10.2% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
- 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 1989 Austin Mini Thirtys pass their MOT?
77.3% of the 1,393 1989 Austin Mini Thirty MOT tests in this dataset passed — a 22.7% fail rate.
What is the most common MOT failure on a 1989 Austin Mini Thirty?
Lighting & signalling, recorded in 13.1% of tests, followed by emissions & environmental (10.2%).
Does the 1989 Mini Thirty get worse with mileage?
Its MOT fail rate rises from 19.2% in the 0-30k band to 22.3% in the 90-120k band.
Methodology & source. Based on 1,393 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.