Triumph Rocket MOT Pass Rate
Overall pass rate across all manufacture years, based on 5,286 real MOT test results. Failure rate: 9.9%.
Data from official DVSA MOT testing records
Triumph Rocket MOT Reliability Overview
The Triumph Rocket is a less common vehicle in the UK, with 5,286 MOT test results recorded in our database spanning 14 manufacture years. It has an overall MOT pass rate of 90.1% and a failure rate of 9.9%, which is well above the UK average of approximately 37%.
Based on this data, the Triumph Rocket earns a "Excellent" reliability rating. The average Triumph Rocket presents for MOT with approximately 13,207 miles on the clock. Manufacture year matters: 2010 models achieve the highest pass rate at 93.5%, while 2017 models have the lowest at 85.8%. This 7.7 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Triumph Rocket is Motorcycle lamps and reflectors, affecting 4.4% 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 Motorcycle brakes at 3.6%. Motorcycle tyres rounds out the top three at 2.4%. 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 2 vintages — click year chips to highlight.
Multi-line chart showing how different Triumph Rocket vintages degrade over time, from age 3 to 20 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.
📉 How Age Affects Reliability
MOT failure rate by vehicle age for the Triumph Rocket. The dashed red line marks when the manufacturer warranty typically expires (3 years).
Line chart showing MOT failure rate by vehicle age from 3 to 15 years, with warranty expiry marked at 3 years.
💡 What does the warranty cliff mean?
The Triumph Rocket actually sees a 15% decrease in failure rate after the warranty period. This is likely due to survivorship bias — unreliable cars are already off the road by this age. Peak failure occurs at age 15 (14.9% fail rate).
Note: pass rates may improve for very old vehicles due to survivorship bias — only well-maintained cars remain on the road.
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 | Motorcycle Lamps And Reflectors | 4.4% | 232 |
| 2 | Motorcycle Brakes | 3.6% | 189 |
| 3 | Motorcycle Lighting And Signalling | 2.4% | 129 |
| 4 | Motorcycle Tyres | 2.4% | 128 |
| 5 | Motorcycle Tyres And Wheels | 1.5% | 77 |
| 6 | Motorcycle Structure And Attachments | 1.1% | 56 |
| 7 | Motorcycle Fuel And Exhaust | 0.9% | 45 |
| 8 | Motorcycle Reg Plates And Vin | 0.7% | 39 |
| 9 | Identification Of The Vehicle | 0.5% | 25 |
| 10 | Motorcycle Audible Warning (Horn) | 0.3% | 17 |
| 11 | Motorcycle Suspension | 0.2% | 13 |
| 12 | Motorcycle Steering | 0.1% | 6 |
| 13 | Motorcycle Steering And Suspension | 0.1% | 5 |
| 14 | Brakes | 0.1% | 3 |
Failures per 10,000 Miles
avg. 13,207 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 lamps and reflectors | 3.32 | 4.4% | 232 |
| Motorcycle brakes | 2.71 | 3.6% | 189 |
| Motorcycle lighting and signalling | 1.85 | 2.4% | 129 |
| Motorcycle tyres | 1.83 | 2.4% | 128 |
| Motorcycle tyres and wheels | 1.10 | 1.5% | 77 |
| Motorcycle structure and attachments | 0.80 | 1.1% | 56 |
| Motorcycle fuel and exhaust | 0.64 | 0.9% | 45 |
| Motorcycle reg plates and vin | 0.56 | 0.7% | 39 |
| Identification of the vehicle | 0.36 | 0.5% | 25 |
| Motorcycle audible warning (Horn) | 0.24 | 0.3% | 17 |
| Motorcycle suspension | 0.19 | 0.2% | 13 |
| Motorcycle steering | 0.09 | 0.1% | 6 |
| Motorcycle steering and suspension | 0.07 | 0.1% | 5 |
| Brakes | 0.04 | 0.1% | 3 |
| Lamps & Electrical | 0.03 | 0.0% | 2 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Triumph Rocket has 13,207 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 Rocket has a mileage-adjusted failure rate of 7.50% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Triumph Rocket MOT Data
The Triumph Rocket is a less common vehicle in the UK, with 5,286 MOT test results recorded in our database spanning 14 manufacture years. It has an overall MOT pass rate of 90.1% and a failure rate of 9.9%, which is well above the UK average of approximately 37%.
For Triumph Rocket owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle lamps and reflectors and motorcycle 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 Rocket is likely to perform.
Motorcycle lamps and reflectors — 4.4% of failures
Motorcycle lamps and reflectors issues account for 4.4% of MOT failures on the Triumph Rocket. 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.
Motorcycle brakes — 3.6% of failures
Motorcycle brakes issues account for 3.6% of MOT failures on the Triumph Rocket. 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 tyres — 2.4% of failures
Motorcycle tyres issues account for 2.4% of MOT failures on the Triumph Rocket. 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.
Frequently Asked Questions
What is the MOT pass rate for the Triumph Rocket?
Based on 5,286 MOT tests in our database, the Triumph Rocket has an overall pass rate of 90.1% (9.9% fail rate).
What are the most common MOT failures on a Triumph Rocket?
The top 3 reasons a Triumph Rocket fails its MOT are: 1. Motorcycle lamps and reflectors (4.4%), 2. Motorcycle brakes (3.6%), 3. Motorcycle tyres (2.4%). Check these areas before booking your MOT.
Is the Triumph Rocket reliable?
With a 9.9% MOT failure rate, the Rocket is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Triumph Rocket?
Based on failure data, focus on: Motorcycle lamps and reflectors (4.4%); Motorcycle brakes (3.6%); Motorcycle tyres (2.4%). 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.