1977 Triumph Trident MOT Pass Rate
Pass rate for Trident models manufactured in 1977, based on 392 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Trident cars tested in 1977. Want to see how cars built in 1977 hold up over time?
View 1977 Triumph Trident vintage page → (86.7% current pass rate)1977 Triumph Trident MOT Analysis
The 1977 Triumph Trident has an MOT pass rate of 89.5% based on 392 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 23,579 miles on the odometer. With a 10.5% failure rate, the 1977 Trident is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1977 Triumph Trident is Motorcycle brakes, responsible for 0.5% of failures. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs range from £150–400. Motorcycle lighting and signalling is the second most common issue at 0.5%.
Top failures specific to 1977 models only. The overall Trident page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Motorcycle Brakes | 0.5% | 2 |
| 2 | Motorcycle Lighting And Signalling | 0.5% | 2 |
Failures per 10,000 Miles
avg. 23,579 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Motorcycle brakes | 0.22 | 0.5% | 2 |
| Motorcycle lighting and signalling | 0.22 | 0.5% | 2 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1977 Triumph Trident has an MOT pass rate of 89.5% based on 392 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 23,579 miles on the odometer. With a 10.5% failure rate, the 1977 Trident is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1977 Triumph Trident, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle brakes: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm). With relatively low average mileage of 23,579 miles, many of these vehicles are still in good mechanical condition.
Motorcycle brakes — 0.5% of failures
Motorcycle brakes issues account for 0.5% of MOT failures on 1977 Triumph Trident models. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Motorcycle lighting and signalling — 0.5% of failures
Motorcycle lighting and signalling issues account for 0.5% of MOT failures on 1977 Triumph Trident models. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.