Bsa D1 MOT Pass Rate
Overall pass rate across all manufacture years, based on 65 real MOT test results. Failure rate: 3.1%.
Data from official DVSA MOT testing records
Bsa D1 MOT Reliability Overview
The Bsa D1 is a rare vehicle in the UK, with 65 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 96.9% and a failure rate of 3.1%, which is well above the UK average of approximately 37%.
Based on this data, the Bsa D1 earns a "Excellent" reliability rating. The average Bsa D1 presents for MOT with approximately 12,246 miles on the clock.
The most common MOT failure for the Bsa D1 is Motorcycle lighting and signalling, affecting 6.2% of all tests. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. The second most common issue is Motorcycle brakes at 3.1%. Motorcycle drive system rounds out the top three at 1.5%. 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 Lighting And Signalling | 6.2% | 4 |
| 2 | Motorcycle Brakes | 3.1% | 2 |
| 3 | Motorcycle Drive System | 1.5% | 1 |
| 4 | Motorcycle Steering And Suspension | 1.5% | 1 |
| 5 | Motorcycle Fuel And Exhaust | 1.5% | 1 |
Failures per 10,000 Miles
avg. 12,246 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 lighting and signalling | 5.03 | 6.2% | 4 |
| Motorcycle brakes | 2.51 | 3.1% | 2 |
| Motorcycle drive system | 1.26 | 1.5% | 1 |
| Motorcycle steering and suspension | 1.26 | 1.5% | 1 |
| Motorcycle fuel and exhaust | 1.26 | 1.5% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Bsa D1 has 12,246 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 D1 has a mileage-adjusted failure rate of 2.53% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Bsa D1 MOT Data
The Bsa D1 is a rare vehicle in the UK, with 65 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 96.9% and a failure rate of 3.1%, which is well above the UK average of approximately 37%.
For Bsa D1 owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle lighting and signalling 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 D1 is likely to perform.
Motorcycle lighting and signalling — 6.2% of failures
Motorcycle lighting and signalling issues account for 6.2% of MOT failures on the Bsa D1. Motorcycle lighting and signalling 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 — 3.1% of failures
Motorcycle brakes issues account for 3.1% of MOT failures on the Bsa D1. 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 drive system — 1.5% of failures
Motorcycle drive system issues account for 1.5% of MOT failures on the Bsa D1. Motorcycle drive system 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.
Frequently Asked Questions
What is the MOT pass rate for the Bsa D1?
Based on 65 (based on limited data) MOT tests in our database, the Bsa D1 has an overall pass rate of 96.9% (3.1% fail rate).
What are the most common MOT failures on a Bsa D1?
The top 3 reasons a Bsa D1 fails its MOT are: 1. Motorcycle lighting and signalling (6.2%), 2. Motorcycle brakes (3.1%), 3. Motorcycle drive system (1.5%). Check these areas before booking your MOT.
Is the Bsa D1 reliable?
With a 3.1% MOT failure rate, the D1 is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Bsa D1?
Based on failure data, focus on: Motorcycle lighting and signalling (6.2%); Motorcycle brakes (3.1%); Motorcycle drive system (1.5%). 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.