1989 Austin Mini Thirty — MOT failures & pass rate
1,445 MOT tests on the 1989 Austin Mini Thirty are in this dataset, and 77.3% of them passed. All cars of a similar age fail 21.3% of the time, so this is 1.4pp worse than the group it competes with. Failures cluster in lighting & signalling, emissions & environmental and suspension.
What the MOT record shows
Lighting & signalling dominates the failure mix at 13.3% of all tests — 3.1 points clear of emissions & environmental, so it is the first thing to check.
At component level the recurring items are non catalyst emissions, headlamp and service brake imbalance — non catalyst emissions alone was recorded 155 times.
Mileage matters less than usual here: the 1989 Mini Thirty fails 19.3% of the time in the 0-30k band and 22.3% at 90-120k, a spread of only 3.0 points.
Advisories point at the next bill rather than this one: suspension was flagged on 26.2% of tests without failing them.
The trend is improving — the fail rate fell from 24.5% in 2021 to 22.3% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 13.3% | 192 |
| 2 | Emissions & environmental | 10.2% | 147 |
| 3 | Suspension | 8.9% | 128 |
| 4 | Brakes | 7.2% | 104 |
| 5 | Body, structure & corrosion | 6.4% | 93 |
| 6 | Visibility | 6.2% | 89 |
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 | 155 |
| 2 | Headlamp | 73 |
| 3 | Service brake imbalance | 67 |
| 4 | Headlamp aim | 66 |
| 5 | Rear fog lamp | 58 |
| 6 | Service brake performance | 53 |
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 | 26.2% | 378 |
| 2 | Emissions & environmental | 18.6% | 269 |
| 3 | Brakes | 14.3% | 207 |
| 4 | Tyres | 11.1% | 161 |
| 5 | Body, structure & corrosion | 11.0% | 159 |
| 6 | Other defects | 5.2% | 75 |
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 | 316 | 19.3% |
| 30-60k | 434 | 24.4% |
| 60-90k | 564 | 23.4% |
| 90-120k | 130 | 22.3% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 306 | 24.5% |
| 2022 | 288 | 20.5% |
| 2023 | 300 | 23.0% |
| 2024 | 286 | 23.1% |
| 2025 | 265 | 22.3% |
What to check before buying a 1989 Mini Thirty
On a 1989 Mini Thirty, lighting & signalling is what the MOT record says goes wrong most — it appeared in 13.3% of tests. Check these areas before you commit.
- Lighting & signalling (13.3% 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 (8.9% 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 1,445 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 13.3% of tests, followed by emissions & environmental (10.2%).
Does the 1989 Mini Thirty get worse with mileage?
Its MOT fail rate rises from 19.3% in the 0-30k band to 22.3% in the 90-120k band.
Methodology & source. Based on 1,445 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.