1984 Rover Mini — MOT failures & pass rate
509 MOT tests on the 1984 Rover Mini are in this dataset, and 79.2% of them passed. City cars of a similar age fail 19.7% of the time, so this is 1.1pp worse than the group it competes with. Failures cluster in lighting & signalling, emissions & environmental and brakes.
What the MOT record shows
No single area dominates — lighting & signalling (11.0%) and emissions & environmental (9.0%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are non catalyst emissions, headlamp aim and joints — non catalyst emissions alone was recorded 52 times.
A 90-120k example is materially riskier than a 0-30k one: 30.8% versus 19.7%.
Advisories point at the next bill rather than this one: suspension was flagged on 21.2% of tests without failing them.
The trend is improving — the fail rate fell from 26.3% in 2021 to 18.4% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.0% | 56 |
| 2 | Emissions & environmental | 9.0% | 46 |
| 3 | Brakes | 7.9% | 40 |
| 4 | Body, structure & corrosion | 6.1% | 31 |
| 5 | Suspension | 5.9% | 30 |
| 6 | Visibility | 5.1% | 26 |
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 | 52 |
| 2 | Headlamp aim | 27 |
| 3 | Joints | 24 |
| 4 | Service brake performance | 20 |
| 5 | Washers | 19 |
| 6 | Rear fog lamp | 18 |
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 | 21.2% | 108 |
| 2 | Emissions & environmental | 14.7% | 75 |
| 3 | Body, structure & corrosion | 10.4% | 53 |
| 4 | Brakes | 7.5% | 38 |
| 5 | Tyres | 5.9% | 30 |
| 6 | Other defects | 4.3% | 22 |
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 | 127 | 19.7% |
| 30-60k | 177 | 19.2% |
| 60-90k | 158 | 21.5% |
| 90-120k | 39 | 30.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 133 | 26.3% |
| 2022 | 115 | 23.5% |
| 2023 | 118 | 17.8% |
| 2024 | 94 | 14.9% |
| 2025 | 49 | 18.4% |
What to check before buying a 1984 Mini
On a 1984 Mini, lighting & signalling is what the MOT record says goes wrong most — it appeared in 11.0% of tests. Check these areas before you commit.
- Lighting & signalling (11.0% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Emissions & environmental (9.0% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
- Brakes (7.9% 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.
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 1984 Rover Minis pass their MOT?
79.2% of the 509 1984 Rover Mini MOT tests in this dataset passed — a 20.8% fail rate.
What is the most common MOT failure on a 1984 Rover Mini?
Lighting & signalling, recorded in 11.0% of tests, followed by emissions & environmental (9.0%).
Does the 1984 Mini get worse with mileage?
Its MOT fail rate rises from 19.7% in the 0-30k band to 30.8% in the 90-120k band.
Methodology & source. Based on 509 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.