Bsa B40wd MOT Pass Rate
Overall pass rate across all manufacture years, based on 42 real MOT test results. Failure rate: 7.1%.
Data from official DVSA MOT testing records
Bsa B40wd MOT Reliability Overview
The Bsa B40wd is a rare vehicle in the UK, with 42 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 92.9% and a failure rate of 7.1%, which is well above the UK average of approximately 37%.
Based on this data, the Bsa B40wd earns a "Excellent" reliability rating. The average Bsa B40wd presents for MOT with approximately 14,752 miles on the clock.
The most common MOT failure for the Bsa B40wd is Motorcycle brakes, affecting 2.4% of all tests. 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. The second most common issue is Motorcycle steering and suspension at 2.4%. Motorcycle tyres and wheels rounds out the top three at 2.4%. 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
* 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 Tyres And Wheels | 2.4% | 1 |
| 2 | Motorcycle Lighting And Signalling | 2.4% | 1 |
| 3 | Motorcycle Brakes | 2.4% | 1 |
| 4 | Motorcycle Steering And Suspension | 2.4% | 1 |
Failures per 10,000 Miles
avg. 14,752 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 tyres and wheels | 1.61 | 2.4% | 1 |
| Motorcycle lighting and signalling | 1.61 | 2.4% | 1 |
| Motorcycle brakes | 1.61 | 2.4% | 1 |
| Motorcycle steering and suspension | 1.61 | 2.4% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Bsa B40wd has 14,752 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 Bsa B40wd has a mileage-adjusted failure rate of 4.81% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Bsa B40wd MOT Data
The Bsa B40wd is a rare vehicle in the UK, with 42 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 92.9% and a failure rate of 7.1%, which is well above the UK average of approximately 37%.
For Bsa B40wd owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle brakes and motorcycle steering and suspension 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 B40wd is likely to perform.
Motorcycle brakes — 2.4% of failures
Motorcycle brakes issues account for 2.4% of MOT failures on the Bsa B40wd. 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 steering and suspension — 2.4% of failures
Motorcycle steering and suspension issues account for 2.4% of MOT failures on the Bsa B40wd. 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.
Motorcycle tyres and wheels — 2.4% of failures
Motorcycle tyres and wheels issues account for 2.4% of MOT failures on the Bsa B40wd. 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.
Frequently Asked Questions
What is the MOT pass rate for the Bsa B40wd?
Based on 42 (based on limited data) MOT tests in our database, the Bsa B40wd has an overall pass rate of 92.9% (7.1% fail rate).
What are the most common MOT failures on a Bsa B40wd?
The top 3 reasons a Bsa B40wd fails its MOT are: 1. Motorcycle brakes (2.4%), 2. Motorcycle steering and suspension (2.4%), 3. Motorcycle tyres and wheels (2.4%). Check these areas before booking your MOT.
Is the Bsa B40wd reliable?
With a 7.1% MOT failure rate, the B40wd is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Bsa B40wd?
Based on failure data, focus on: Motorcycle brakes (2.4%); Motorcycle steering and suspension (2.4%); Motorcycle tyres and wheels (2.4%). 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.