1964 Triumph 21 MOT Pass Rate
Pass rate for 21 models manufactured in 1964, based on 30 real MOT test results.
Data from official DVSA MOT testing records
1964 Triumph 21 MOT Analysis
The 1964 Triumph 21 has an MOT pass rate of 93.3% based on 30 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 15,227 miles on the odometer. With a 6.7% failure rate, the 1964 21 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1964 Triumph 21 is Motorcycle tyres and wheels, responsible for 10.0% of failures. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs range from £50–200 per tyre. Motorcycle brakes is the second most common issue at 3.3%.
Top failures specific to 1964 models only. The overall 21 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 Tyres And Wheels | 10.0% | 3 |
| 2 | Motorcycle Brakes | 3.3% | 1 |
Failures per 10,000 Miles
avg. 15,227 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 tyres and wheels | 6.57 | 10.0% | 3 |
| Motorcycle brakes | 2.19 | 3.3% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1964 Triumph 21 has an MOT pass rate of 93.3% based on 30 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 15,227 miles on the odometer. With a 6.7% failure rate, the 1964 21 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1964 Triumph 21, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle tyres and wheels: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating. With relatively low average mileage of 15,227 miles, many of these vehicles are still in good mechanical condition.
Motorcycle tyres and wheels — 10.0% of failures
Motorcycle tyres and wheels issues account for 10.0% of MOT failures on 1964 Triumph 21 models. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Motorcycle brakes — 3.3% of failures
Motorcycle brakes issues account for 3.3% of MOT failures on 1964 Triumph 21 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).
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.