2021 Sinnis Terrain 125 MOT Pass Rate
Pass rate for Terrain 125 models manufactured in 2021, based on 382 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Terrain 125 cars tested in 2021. Want to see how cars built in 2021 hold up over time?
View 2021 Sinnis Terrain 125 vintage page → (77.7% current pass rate)2021 Sinnis Terrain 125 MOT Analysis
The 2021 Sinnis Terrain 125 has an MOT pass rate of 78.0% based on 382 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 7,243 miles on the odometer. With a 22.0% failure rate, the 2021 Terrain 125 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2021 Sinnis Terrain 125 is Motorcycle brakes, responsible for 15.7% of failures. 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 range from £150–400. Motorcycle structure and attachments is the second most common issue at 14.1%. Motorcycle lamps and reflectors follows at 8.6%.
Top failures specific to 2021 models only. The overall Terrain 125 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 Brakes | 15.7% | 60 |
| 2 | Motorcycle Structure And Attachments | 14.1% | 54 |
| 3 | Motorcycle Lamps And Reflectors | 8.6% | 33 |
| 4 | Motorcycle Suspension | 8.1% | 31 |
| 5 | Motorcycle Tyres | 6.5% | 25 |
| 6 | Motorcycle Steering | 3.9% | 15 |
| 7 | Motorcycle Wheels | 2.6% | 10 |
| 8 | Non-component Advisories | 1.3% | 5 |
| 9 | Motorcycle Audible Warning (Horn) | 0.8% | 3 |
| 10 | Identification Of The Vehicle | 0.3% | 1 |
Failures per 10,000 Miles
avg. 7,243 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 brakes | 21.69 | 15.7% | 60 |
| Motorcycle structure and attachments | 19.52 | 14.1% | 54 |
| Motorcycle lamps and reflectors | 11.93 | 8.6% | 33 |
| Motorcycle suspension | 11.20 | 8.1% | 31 |
| Motorcycle tyres | 9.04 | 6.5% | 25 |
| Motorcycle steering | 5.42 | 3.9% | 15 |
| Motorcycle wheels | 3.61 | 2.6% | 10 |
| Non-component advisories | 1.81 | 1.3% | 5 |
| Motorcycle audible warning (Horn) | 1.08 | 0.8% | 3 |
| Identification of the vehicle | 0.36 | 0.3% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2021 Sinnis Terrain 125 has an MOT pass rate of 78.0% based on 382 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 7,243 miles on the odometer. With a 22.0% failure rate, the 2021 Terrain 125 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2021 Sinnis Terrain 125, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle brakes: 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). With relatively low average mileage of 7,243 miles, many of these vehicles are still in good mechanical condition.
Motorcycle brakes — 15.7% of failures
Motorcycle brakes issues account for 15.7% of MOT failures on 2021 Sinnis Terrain 125 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).
Motorcycle structure and attachments — 14.1% of failures
Motorcycle structure and attachments issues account for 14.1% of MOT failures on 2021 Sinnis Terrain 125 models. Motorcycle structure and attachments 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 lamps and reflectors — 8.6% of failures
Motorcycle lamps and reflectors issues account for 8.6% of MOT failures on 2021 Sinnis Terrain 125 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.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.