Triumph Tr6 MOT Pass Rate
Overall pass rate across all manufacture years, based on 37,821 real MOT test results. Failure rate: 20.9%.
Data from official DVSA MOT testing records
Triumph Tr6 MOT Reliability Overview
The Triumph Tr6 is a relatively common sight on UK roads, with 37,821 MOT test results recorded in our database spanning 28 manufacture years. It has an overall MOT pass rate of 79.1% and a failure rate of 20.9%, which is well above the UK average of approximately 37%.
Based on this data, the Triumph Tr6 earns a "Excellent" reliability rating. The average Triumph Tr6 presents for MOT with approximately 45,681 miles on the clock. Manufacture year matters: 1963 models achieve the highest pass rate at 97.1%, while 1993 models have the lowest at 65.5%. This 31.6 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Triumph Tr6 is Lamps, Reflectors and Electrical Equipment, affecting 15.4% of all tests. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. The second most common issue is Brakes at 13.3%. Suspension rounds out the top three at 13.1%. Together, these top 3 failure categories account for a significant portion of all MOT failures for this model.
Top failures across all manufacture years combined. Individual year pages may show different top failures.
What Fails Most
Best Year to Buy
📈 How Each Vintage Ages
Tracking how each manufacture year's MOT pass rate changes as the car ages. Showing 7 vintages — click year chips to highlight.
Multi-line chart showing how different Triumph Tr6 vintages degrade over time, from age 3 to 54 years.
Only vintages with 100+ tests in at least 3 different test years are shown. Fleet average is the UK-wide pass rate for all cars at each age.
Pass Rate by Manufacture Year
* High Fail Rate badge indicates an MOT pass rate below 65% (failure rate above 35%).
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Lamps, Reflectors And Electrical Equipment | 22.7% | 8,607 |
| 2 | Brakes | 16.4% | 6,191 |
| 3 | Suspension | 16.0% | 6,035 |
| 4 | Steering | 7.1% | 2,699 |
| 5 | Driver's View Of The Road | 6.7% | 2,526 |
| 6 | Body, Structure And General Items | 3.0% | 1,137 |
| 7 | Tyres | 2.5% | 938 |
| 8 | Exhaust, Fuel And Emissions | 2.4% | 908 |
| 9 | Seat Belts And Supplementary Restraint Systems | 1.5% | 582 |
| 10 | Visibility | 1.1% | 434 |
| 11 | Noise, Emissions And Leaks | 0.8% | 302 |
| 12 | Body, Chassis, Structure | 0.8% | 287 |
| 13 | Non-component Advisories | 0.7% | 258 |
| 14 | Motorcycle Lighting And Signalling | 0.6% | 224 |
Failures per 10,000 Miles
avg. 45,681 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 |
|---|---|---|---|
| Lamps & Electrical | 4.98 | 22.7% | 8,607 |
| Brakes | 3.58 | 16.4% | 6,191 |
| Suspension | 3.49 | 16.0% | 6,035 |
| Visibility | 1.71 | 7.8% | 2,960 |
| Steering | 1.56 | 7.1% | 2,699 |
| Body & Structure | 0.83 | 3.8% | 1,424 |
| Tyres | 0.54 | 2.5% | 938 |
| Emissions & Exhaust | 0.53 | 2.4% | 908 |
| Seat Belts | 0.34 | 1.5% | 582 |
| Noise, emissions and leaks | 0.17 | 0.8% | 302 |
| Non-component advisories | 0.15 | 0.7% | 258 |
| Motorcycle lighting and signalling | 0.13 | 0.6% | 224 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Triumph Tr6 has 45,681 miles when tested for MOT.
📊 Mileage-Adjusted Failure Rate
How often this car fails MOT relative to how much it's driven — a fairer comparison than raw pass rate.
The Triumph Tr6 has a mileage-adjusted failure rate of 4.58% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Triumph Tr6 MOT Data
The Triumph Tr6 is a relatively common sight on UK roads, with 37,821 MOT test results recorded in our database spanning 28 manufacture years. It has an overall MOT pass rate of 79.1% and a failure rate of 20.9%, which is well above the UK average of approximately 37%.
For Triumph Tr6 owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on lamps, reflectors and electrical equipment and brakes for the best chance of a first-time pass. Use our detailed year-by-year breakdown and failure analysis below to understand how your specific Tr6 is likely to perform.
Lamps, Reflectors and Electrical Equipment — 15.4% of failures
Lamps, Reflectors and Electrical Equipment issues account for 15.4% of MOT failures on the Triumph Tr6. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Brakes — 13.3% of failures
Brakes issues account for 13.3% of MOT failures on the Triumph Tr6. 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).
Suspension — 13.1% of failures
Suspension issues account for 13.1% of MOT failures on the Triumph Tr6. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Frequently Asked Questions
What is the MOT pass rate for the Triumph Tr6?
Based on 37,821 MOT tests in our database, the Triumph Tr6 has an overall pass rate of 79.1% (20.9% fail rate).
What are the most common MOT failures on a Triumph Tr6?
The top 3 reasons a Triumph Tr6 fails its MOT are: 1. Lamps, Reflectors and Electrical Equipment (15.4%), 2. Brakes (13.3%), 3. Suspension (13.1%). Check these areas before booking your MOT.
Is the Triumph Tr6 reliable?
With a 20.9% MOT failure rate, the Tr6 is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Triumph Tr6?
Based on failure data, focus on: Lamps, Reflectors and Electrical Equipment (15.4%); Brakes (13.3%); Suspension (13.1%). These are the areas most likely to cause a fail. Also check all lights, tyres (minimum 1.6mm tread), and windscreen condition — these are quick wins that apply to all cars.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.