Triumph Dolomite MOT Pass Rate
Overall pass rate across all manufacture years, based on 9,408 real MOT test results. Failure rate: 35.0%.
Data from official DVSA MOT testing records
Triumph Dolomite MOT Reliability Overview
The Triumph Dolomite is a less common vehicle in the UK, with 9,408 MOT test results recorded in our database spanning 16 manufacture years. It has an overall MOT pass rate of 65.0% and a failure rate of 35.0%, which is around the UK average of approximately 37%.
Based on this data, the Triumph Dolomite earns a "Average" reliability rating. The average Triumph Dolomite presents for MOT with approximately 54,221 miles on the clock. Manufacture year matters: 1968 models achieve the highest pass rate at 83.3%, while 1982 models have the lowest at 25.8%. This 57.5 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Triumph Dolomite is Brakes, affecting 31.4% of all tests. 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. The second most common issue is Suspension at 31.0%. Lamps, Reflectors and Electrical Equipment rounds out the top three at 25.9%. 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 4 vintages — click year chips to highlight.
Multi-line chart showing how different Triumph Dolomite vintages degrade over time, from age 3 to 46 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 | Suspension | 41.9% | 3,943 |
| 2 | Brakes | 41.5% | 3,902 |
| 3 | Lamps, Reflectors And Electrical Equipment | 38.6% | 3,632 |
| 4 | Steering | 17.5% | 1,645 |
| 5 | Exhaust, Fuel And Emissions | 14.9% | 1,400 |
| 6 | Driver's View Of The Road | 10.7% | 1,009 |
| 7 | Body, Structure And General Items | 8.1% | 761 |
| 8 | Tyres | 6.3% | 595 |
| 9 | Seat Belts And Supplementary Restraint Systems | 3.2% | 297 |
| 10 | Noise, Emissions And Leaks | 2.6% | 243 |
| 11 | Non-component Advisories | 1.6% | 153 |
| 12 | Visibility | 1.5% | 144 |
| 13 | Body, Chassis, Structure | 1.4% | 136 |
| 14 | Registration Plates And Vin | 0.7% | 65 |
Failures per 10,000 Miles
avg. 54,221 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 |
|---|---|---|---|
| Suspension | 7.73 | 41.9% | 3,943 |
| Brakes | 7.65 | 41.5% | 3,902 |
| Lamps & Electrical | 7.12 | 38.6% | 3,632 |
| Steering | 3.22 | 17.5% | 1,645 |
| Emissions & Exhaust | 2.74 | 14.9% | 1,400 |
| Visibility | 2.26 | 12.2% | 1,153 |
| Body & Structure | 1.76 | 9.5% | 897 |
| Tyres | 1.17 | 6.3% | 595 |
| Seat Belts | 0.58 | 3.2% | 297 |
| Noise, emissions and leaks | 0.48 | 2.6% | 243 |
| Non-component advisories | 0.30 | 1.6% | 153 |
| Registration Plates and VIN | 0.13 | 0.7% | 65 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Triumph Dolomite has 54,221 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 Dolomite has a mileage-adjusted failure rate of 6.46% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Triumph Dolomite MOT Data
The Triumph Dolomite is a less common vehicle in the UK, with 9,408 MOT test results recorded in our database spanning 16 manufacture years. It has an overall MOT pass rate of 65.0% and a failure rate of 35.0%, which is around the UK average of approximately 37%.
For Triumph Dolomite owners, these results suggest average reliability — some preparation before MOT can improve pass chances. Focus your pre-MOT checks on brakes and suspension 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 Dolomite is likely to perform.
Brakes — 31.4% of failures
Brakes issues account for 31.4% of MOT failures on the Triumph Dolomite. 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 — 31.0% of failures
Suspension issues account for 31.0% of MOT failures on the Triumph Dolomite. 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.
Lamps, Reflectors and Electrical Equipment — 25.9% of failures
Lamps, Reflectors and Electrical Equipment issues account for 25.9% of MOT failures on the Triumph Dolomite. 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.
Frequently Asked Questions
What is the MOT pass rate for the Triumph Dolomite?
Based on 9,408 MOT tests in our database, the Triumph Dolomite has an overall pass rate of 65.0% (35.0% fail rate).
What are the most common MOT failures on a Triumph Dolomite?
The top 3 reasons a Triumph Dolomite fails its MOT are: 1. Brakes (31.4%), 2. Suspension (31.0%), 3. Lamps, Reflectors and Electrical Equipment (25.9%). Check these areas before booking your MOT.
Is the Triumph Dolomite reliable?
With a 35.0% MOT failure rate, the Dolomite is about average compared to the UK average of ~40%.
What should I check before an MOT on my Triumph Dolomite?
Based on failure data, focus on: Brakes (31.4%); Suspension (31.0%); Lamps, Reflectors and Electrical Equipment (25.9%). 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.