1980 Triumph Tr 7 — MOT failures & pass rate
The 1980 Triumph Tr 7 passed 80.9% of its 492 recorded MOT tests. All cars of a similar age fail 16.2% of the time, so this is 2.9pp worse than the group it competes with. Failures cluster in lighting & signalling, emissions & environmental and brakes.
What the MOT record shows
Lighting & signalling dominates the failure mix at 12.4% of all tests — 4.3 points clear of emissions & environmental, so it is the first thing to check.
At component level the recurring items are non catalyst emissions, service brake performance and washers — non catalyst emissions alone was recorded 42 times.
Mileage matters less than usual here: the 1980 Tr 7 fails 21.3% of the time in the 0-30k band and 22.6% at 90-120k, a spread of only 1.3 points.
Advisories point at the next bill rather than this one: suspension was flagged on 22.8% of tests without failing them.
The trend is improving — the fail rate fell from 21.5% in 2021 to 19.5% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 12.4% | 61 |
| 2 | Emissions & environmental | 8.1% | 40 |
| 3 | Brakes | 7.7% | 38 |
| 4 | Visibility | 6.3% | 31 |
| 5 | Suspension | 5.5% | 27 |
| 6 | Steering | 4.7% | 23 |
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 | 42 |
| 2 | Service brake performance | 26 |
| 3 | Washers | 22 |
| 4 | Position lamp | 22 |
| 5 | Individual direction indicators | 18 |
| 6 | Headlamp | 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 | 22.8% | 112 |
| 2 | Emissions & environmental | 17.7% | 87 |
| 3 | Brakes | 8.7% | 43 |
| 4 | Tyres | 8.1% | 40 |
| 5 | Steering | 7.7% | 38 |
| 6 | Body, structure & corrosion | 6.1% | 30 |
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 | 178 | 21.3% |
| 30-60k | 110 | 11.8% |
| 60-90k | 151 | 20.5% |
| 90-120k | 53 | 22.6% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 144 | 21.5% |
| 2022 | 89 | 12.4% |
| 2023 | 91 | 19.8% |
| 2024 | 91 | 20.9% |
| 2025 | 77 | 19.5% |
What to check before buying a 1980 Tr 7
On a 1980 Tr 7, lighting & signalling is what the MOT record says goes wrong most — it appeared in 12.4% of tests. Check these areas before you commit.
- Lighting & signalling (12.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Emissions & environmental (8.1% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
- Brakes (7.7% 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 1980 Triumph Tr 7s pass their MOT?
80.9% of the 492 1980 Triumph Tr 7 MOT tests in this dataset passed — a 19.1% fail rate.
What is the most common MOT failure on a 1980 Triumph Tr 7?
Lighting & signalling, recorded in 12.4% of tests, followed by emissions & environmental (8.1%).
Does the 1980 Tr 7 get worse with mileage?
Its MOT fail rate rises from 21.3% in the 0-30k band to 22.6% in the 90-120k band.
Methodology & source. Based on 492 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.