Ajs Firefox MOT Pass Rate
Overall pass rate across all manufacture years, based on 1,331 real MOT test results. Failure rate: 31.6%.
Data from official DVSA MOT testing records
Ajs Firefox MOT Reliability Overview
The Ajs Firefox is a niche vehicle in the UK, with 1,331 MOT test results recorded in our database spanning 10 manufacture years. It has an overall MOT pass rate of 68.4% and a failure rate of 31.6%, which is slightly above the UK average of approximately 37%.
Based on this data, the Ajs Firefox earns a "Good" reliability rating. The average Ajs Firefox presents for MOT with approximately 7,368 miles on the clock. Manufacture year matters: 2019 models achieve the highest pass rate at 76.6%, while 2021 models have the lowest at 57.4%. This 19.2 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Ajs Firefox is Motorcycle lamps and reflectors, affecting 28.8% 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 16.5%. Motorcycle suspension rounds out the top three at 12.4%. 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
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 | 28.8% | 383 |
| 2 | Motorcycle Brakes | 16.5% | 219 |
| 3 | Motorcycle Suspension | 12.4% | 165 |
| 4 | Motorcycle Structure And Attachments | 6.9% | 92 |
| 5 | Motorcycle Steering | 6.5% | 87 |
| 6 | Motorcycle Tyres | 6.0% | 80 |
| 7 | Motorcycle Lighting And Signalling | 4.0% | 53 |
| 8 | Motorcycle Audible Warning (Horn) | 2.7% | 36 |
| 9 | Motorcycle Steering And Suspension | 2.6% | 35 |
| 10 | Identification Of The Vehicle | 1.4% | 18 |
| 11 | Motorcycle Tyres And Wheels | 0.7% | 9 |
| 12 | Non-component Advisories | 0.7% | 9 |
| 13 | Motorcycle Fuel And Exhaust | 0.5% | 7 |
| 14 | Motorcycle Wheels | 0.4% | 5 |
| 15 | Motorcycle Body And Structure | 0.2% | 3 |
Failures per 10,000 Miles
avg. 7,368 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 | 39.05 | 28.8% | 383 |
| Motorcycle brakes | 22.33 | 16.5% | 219 |
| Motorcycle suspension | 16.83 | 12.4% | 165 |
| Motorcycle structure and attachments | 9.38 | 6.9% | 92 |
| Motorcycle steering | 8.87 | 6.5% | 87 |
| Motorcycle tyres | 8.16 | 6.0% | 80 |
| Motorcycle lighting and signalling | 5.40 | 4.0% | 53 |
| Motorcycle audible warning (Horn) | 3.67 | 2.7% | 36 |
| Motorcycle steering and suspension | 3.57 | 2.6% | 35 |
| Identification of the vehicle | 1.84 | 1.4% | 18 |
| Motorcycle tyres and wheels | 0.92 | 0.7% | 9 |
| Non-component advisories | 0.92 | 0.7% | 9 |
| Motorcycle fuel and exhaust | 0.71 | 0.5% | 7 |
| Motorcycle wheels | 0.51 | 0.4% | 5 |
| Motorcycle body and structure | 0.31 | 0.2% | 3 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Ajs Firefox has 7,368 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 Ajs Firefox has a mileage-adjusted failure rate of 42.89% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Ajs Firefox MOT Data
The Ajs Firefox is a niche vehicle in the UK, with 1,331 MOT test results recorded in our database spanning 10 manufacture years. It has an overall MOT pass rate of 68.4% and a failure rate of 31.6%, which is slightly above the UK average of approximately 37%.
For Ajs Firefox 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 Firefox is likely to perform.
Motorcycle lamps and reflectors — 28.8% of failures
Motorcycle lamps and reflectors issues account for 28.8% of MOT failures on the Ajs Firefox. 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 — 16.5% of failures
Motorcycle brakes issues account for 16.5% of MOT failures on the Ajs Firefox. 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 suspension — 12.4% of failures
Motorcycle suspension issues account for 12.4% of MOT failures on the Ajs Firefox. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Frequently Asked Questions
What is the MOT pass rate for the Ajs Firefox?
Based on 1,331 MOT tests in our database, the Ajs Firefox has an overall pass rate of 68.4% (31.6% fail rate).
What are the most common MOT failures on a Ajs Firefox?
The top 3 reasons a Ajs Firefox fails its MOT are: 1. Motorcycle lamps and reflectors (28.8%), 2. Motorcycle brakes (16.5%), 3. Motorcycle suspension (12.4%). Check these areas before booking your MOT.
Is the Ajs Firefox reliable?
With a 31.6% MOT failure rate, the Firefox is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Ajs Firefox?
Based on failure data, focus on: Motorcycle lamps and reflectors (28.8%); Motorcycle brakes (16.5%); Motorcycle suspension (12.4%). 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.