Triumph Bonneville 120 MOT Pass Rate
Overall pass rate across all manufacture years, based on 40 real MOT test results. Failure rate: 15.0%.
Data from official DVSA MOT testing records
Triumph Bonneville 120 MOT Reliability Overview
The Triumph Bonneville 120 is a rare vehicle in the UK, with 40 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 85.0% and a failure rate of 15.0%, which is well above the UK average of approximately 37%.
Based on this data, the Triumph Bonneville 120 earns a "Excellent" reliability rating. The average Triumph Bonneville 120 presents for MOT with approximately 3,936 miles on the clock.
The most common MOT failure for the Triumph Bonneville 120 is Motorcycle lighting and signalling, affecting 7.5% of all tests. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. The second most common issue is Motorcycle brakes at 2.5%. Motorcycle fuel and exhaust rounds out the top three at 2.5%. 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
* 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 Lighting And Signalling | 10.0% | 4 |
| 2 | Motorcycle Brakes | 2.5% | 1 |
| 3 | Motorcycle Fuel And Exhaust | 2.5% | 1 |
| 4 | Motorcycle Body And Structure | 2.5% | 1 |
| 5 | Motorcycle Steering And Suspension | 2.5% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Triumph Bonneville 120 has 3,936 miles when tested for MOT.
About Triumph Bonneville 120 MOT Data
The Triumph Bonneville 120 is a rare vehicle in the UK, with 40 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 85.0% and a failure rate of 15.0%, which is well above the UK average of approximately 37%.
For Triumph Bonneville 120 owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle lighting and signalling 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 Bonneville 120 is likely to perform.
Motorcycle lighting and signalling — 7.5% of failures
Motorcycle lighting and signalling issues account for 7.5% of MOT failures on the Triumph Bonneville 120. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Motorcycle brakes — 2.5% of failures
Motorcycle brakes issues account for 2.5% of MOT failures on the Triumph Bonneville 120. 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 fuel and exhaust — 2.5% of failures
Motorcycle fuel and exhaust issues account for 2.5% of MOT failures on the Triumph Bonneville 120. Motorcycle fuel and exhaust issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Frequently Asked Questions
What is the MOT pass rate for the Triumph Bonneville 120?
Based on 40 (based on limited data) MOT tests in our database, the Triumph Bonneville 120 has an overall pass rate of 85.0% (15.0% fail rate).
What are the most common MOT failures on a Triumph Bonneville 120?
The top 3 reasons a Triumph Bonneville 120 fails its MOT are: 1. Motorcycle lighting and signalling (7.5%), 2. Motorcycle brakes (2.5%), 3. Motorcycle fuel and exhaust (2.5%). Check these areas before booking your MOT.
Is the Triumph Bonneville 120 reliable?
With a 15.0% MOT failure rate, the Bonneville 120 is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Triumph Bonneville 120?
Based on failure data, focus on: Motorcycle lighting and signalling (7.5%); Motorcycle brakes (2.5%); Motorcycle fuel and exhaust (2.5%). 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.