1970 Triumph Herald 1200 MOT Pass Rate
Pass rate for Herald 1200 models manufactured in 1970, based on 198 real MOT test results.
Data from official DVSA MOT testing records
1970 Triumph Herald 1200 MOT Analysis
The 1970 Triumph Herald 1200 has an MOT pass rate of 66.7% based on 198 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 65,736 miles on the odometer. With a 33.3% failure rate, the 1970 Herald 1200 is rated as "Good" for MOT reliability.
The leading cause of MOT failure for the 1970 Triumph Herald 1200 is Brakes, responsible for 2.0% 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. Noise, emissions and leaks is the second most common issue at 0.5%. Tyres follows at 0.5%.
Top failures specific to 1970 models only. The overall Herald 1200 page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
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| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Brakes | 2.0% | 4 |
| 2 | Noise, Emissions And Leaks | 0.5% | 1 |
| 3 | Tyres | 0.5% | 1 |
| 4 | Lamps, Reflectors And Electrical Equipment | 0.5% | 1 |
Failures per 10,000 Miles
avg. 65,736 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.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Brakes | 0.31 | 2.0% | 4 |
| Noise, emissions and leaks | 0.08 | 0.5% | 1 |
| Tyres | 0.08 | 0.5% | 1 |
| Lamps & Electrical | 0.08 | 0.5% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1970 Triumph Herald 1200 has an MOT pass rate of 66.7% based on 198 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 65,736 miles on the odometer. With a 33.3% failure rate, the 1970 Herald 1200 is rated as "Good" for MOT reliability.
If you own or are considering buying a 1970 Triumph Herald 1200, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to 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). At 65,736 average miles, these vehicles are in the mid-range where component wear starts to become a factor.
Brakes — 2.0% of failures
Brakes issues account for 2.0% of MOT failures on 1970 Triumph Herald 1200 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).
Noise, emissions and leaks — 0.5% of failures
Noise, emissions and leaks issues account for 0.5% of MOT failures on 1970 Triumph Herald 1200 models. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Tyres — 0.5% of failures
Tyres issues account for 0.5% of MOT failures on 1970 Triumph Herald 1200 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.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.