2018 Triumph Bonneville MOT Pass Rate
Pass rate for Bonneville models manufactured in 2018, based on 8,653 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Bonneville cars tested in 2018. Want to see how cars built in 2018 hold up over time?
View 2018 Triumph Bonneville vintage page → (91.9% current pass rate)2018 Triumph Bonneville MOT Analysis
The 2018 Triumph Bonneville has an MOT pass rate of 91.5% based on 8,653 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 6,050 miles on the odometer. With a 8.5% failure rate, the 2018 Bonneville is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2018 Triumph Bonneville is Motorcycle lamps and reflectors, responsible for 1.0% of failures. 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 range from £5–50. Motorcycle tyres is the second most common issue at 0.4%. Motorcycle brakes follows at 0.3%.
Top failures specific to 2018 models only. The overall Bonneville page may show different rankings.
What Fails Most
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 | 1.0% | 88 |
| 2 | Motorcycle Tyres | 0.4% | 33 |
| 3 | Motorcycle Brakes | 0.3% | 30 |
| 4 | Motorcycle Structure And Attachments | 0.2% | 21 |
| 5 | Identification Of The Vehicle | 0.2% | 14 |
| 6 | Motorcycle Audible Warning (Horn) | 0.1% | 12 |
| 7 | Motorcycle Steering | 0.1% | 9 |
Failures per 10,000 Miles
avg. 6,050 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 | 1.68 | 1.0% | 88 |
| Motorcycle tyres | 0.63 | 0.4% | 33 |
| Motorcycle brakes | 0.57 | 0.3% | 30 |
| Motorcycle structure and attachments | 0.40 | 0.2% | 21 |
| Identification of the vehicle | 0.27 | 0.2% | 14 |
| Motorcycle audible warning (Horn) | 0.23 | 0.1% | 12 |
| Motorcycle steering | 0.17 | 0.1% | 9 |
| Motorcycle suspension | 0.06 | 0.0% | 3 |
| Motorcycle wheels | 0.02 | 0.0% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2018 Triumph Bonneville has an MOT pass rate of 91.5% based on 8,653 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 6,050 miles on the odometer. With a 8.5% failure rate, the 2018 Bonneville is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2018 Triumph Bonneville, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle lamps and reflectors: 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. With relatively low average mileage of 6,050 miles, many of these vehicles are still in good mechanical condition.
Motorcycle lamps and reflectors — 1.0% of failures
Motorcycle lamps and reflectors issues account for 1.0% of MOT failures on 2018 Triumph Bonneville models. 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 tyres — 0.4% of failures
Motorcycle tyres issues account for 0.4% of MOT failures on 2018 Triumph Bonneville 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.
Motorcycle brakes — 0.3% of failures
Motorcycle brakes issues account for 0.3% of MOT failures on 2018 Triumph Bonneville 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).
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.