Sinnis Js MOT Pass Rate
Overall pass rate across all manufacture years, based on 1,162 real MOT test results. Failure rate: 34.8%.
Data from official DVSA MOT testing records
Sinnis Js MOT Reliability Overview
The Sinnis Js is a niche vehicle in the UK, with 1,162 MOT test results recorded in our database spanning 3 manufacture years. It has an overall MOT pass rate of 65.2% and a failure rate of 34.8%, which is slightly above the UK average of approximately 37%.
Based on this data, the Sinnis Js earns a "Good" reliability rating. The average Sinnis Js presents for MOT with approximately 10,609 miles on the clock. Manufacture year matters: 2015 models achieve the highest pass rate at 67.5%, while 2016 models have the lowest at 59.8%. 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 Sinnis Js is Motorcycle lamps and reflectors, affecting 33.0% 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 structure and attachments at 25.0%. Motorcycle brakes rounds out the top three at 22.4%. 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
📉 How Age Affects Reliability
MOT failure rate by vehicle age for the Sinnis Js. 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 8 years, with warranty expiry marked at 3 years.
💡 What does the warranty cliff mean?
The Sinnis Js actually sees a 13% 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 5 (41.2% 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 | 33.0% | 384 |
| 2 | Motorcycle Structure And Attachments | 25.0% | 290 |
| 3 | Motorcycle Brakes | 22.4% | 260 |
| 4 | Motorcycle Steering | 13.3% | 154 |
| 5 | Motorcycle Suspension | 11.2% | 130 |
| 6 | Motorcycle Tyres | 9.1% | 106 |
| 7 | Motorcycle Lighting And Signalling | 2.9% | 34 |
| 8 | Motorcycle Audible Warning (Horn) | 2.4% | 28 |
| 9 | Motorcycle Drive System | 2.1% | 24 |
| 10 | Motorcycle Steering And Suspension | 1.7% | 20 |
| 11 | Motorcycle Tyres And Wheels | 1.3% | 15 |
| 12 | Non-component Advisories | 1.1% | 13 |
| 13 | Identification Of The Vehicle | 0.9% | 11 |
| 14 | Motorcycle Wheels | 0.6% | 7 |
| 15 | Motorcycle Body And Structure | 0.3% | 3 |
Failures per 10,000 Miles
avg. 10,609 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 | 31.15 | 33.0% | 384 |
| Motorcycle structure and attachments | 23.52 | 25.0% | 290 |
| Motorcycle brakes | 21.09 | 22.4% | 260 |
| Motorcycle steering | 12.49 | 13.3% | 154 |
| Motorcycle suspension | 10.55 | 11.2% | 130 |
| Motorcycle tyres | 8.60 | 9.1% | 106 |
| Motorcycle lighting and signalling | 2.76 | 2.9% | 34 |
| Motorcycle audible warning (Horn) | 2.27 | 2.4% | 28 |
| Motorcycle drive system | 1.95 | 2.1% | 24 |
| Motorcycle steering and suspension | 1.62 | 1.7% | 20 |
| Motorcycle tyres and wheels | 1.22 | 1.3% | 15 |
| Non-component advisories | 1.05 | 1.1% | 13 |
| Identification of the vehicle | 0.89 | 0.9% | 11 |
| Motorcycle wheels | 0.57 | 0.6% | 7 |
| Motorcycle body and structure | 0.24 | 0.3% | 3 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Sinnis Js has 10,609 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 Sinnis Js has a mileage-adjusted failure rate of 32.80% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Sinnis Js MOT Data
The Sinnis Js is a niche vehicle in the UK, with 1,162 MOT test results recorded in our database spanning 3 manufacture years. It has an overall MOT pass rate of 65.2% and a failure rate of 34.8%, which is slightly above the UK average of approximately 37%.
For Sinnis Js 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 structure and attachments 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 Js is likely to perform.
Motorcycle lamps and reflectors — 33.0% of failures
Motorcycle lamps and reflectors issues account for 33.0% of MOT failures on the Sinnis Js. 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 structure and attachments — 25.0% of failures
Motorcycle structure and attachments issues account for 25.0% of MOT failures on the Sinnis Js. 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 brakes — 22.4% of failures
Motorcycle brakes issues account for 22.4% of MOT failures on the Sinnis Js. 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).
Frequently Asked Questions
What is the MOT pass rate for the Sinnis Js?
Based on 1,162 MOT tests in our database, the Sinnis Js has an overall pass rate of 65.2% (34.8% fail rate).
What are the most common MOT failures on a Sinnis Js?
The top 3 reasons a Sinnis Js fails its MOT are: 1. Motorcycle lamps and reflectors (33.0%), 2. Motorcycle structure and attachments (25.0%), 3. Motorcycle brakes (22.4%). Check these areas before booking your MOT.
Is the Sinnis Js reliable?
With a 34.8% MOT failure rate, the Js is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Sinnis Js?
Based on failure data, focus on: Motorcycle lamps and reflectors (33.0%); Motorcycle structure and attachments (25.0%); Motorcycle brakes (22.4%). 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.