Bsa C 15 MOT Pass Rate
Overall pass rate across all manufacture years, based on 159 real MOT test results. Failure rate: 6.9%.
Data from official DVSA MOT testing records
Bsa C 15 MOT Reliability Overview
The Bsa C 15 is a rare vehicle in the UK, with 159 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 93.1% and a failure rate of 6.9%, which is well above the UK average of approximately 37%.
Based on this data, the Bsa C 15 earns a "Excellent" reliability rating. The average Bsa C 15 presents for MOT with approximately 16,781 miles on the clock. The 1965 manufacture year performs best with a 97.4% pass rate.
The most common MOT failure for the Bsa C 15 is Motorcycle steering and suspension, affecting 3.8% of all tests. 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. The second most common issue is Motorcycle lighting and signalling at 2.5%. Motorcycle drive system rounds out the top three at 1.9%. 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
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 Steering And Suspension | 4.4% | 7 |
| 2 | Motorcycle Lighting And Signalling | 3.1% | 5 |
| 3 | Motorcycle Drive System | 2.5% | 4 |
| 4 | Motorcycle Body And Structure | 1.3% | 2 |
| 5 | Motorcycle Brakes | 0.6% | 1 |
| 6 | Motorcycle Tyres And Wheels | 0.6% | 1 |
| 7 | Motorcycle Reg Plates And Vin | 0.6% | 1 |
Failures per 10,000 Miles
avg. 16,781 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 steering and suspension | 2.62 | 4.4% | 7 |
| Motorcycle lighting and signalling | 1.87 | 3.1% | 5 |
| Motorcycle drive system | 1.50 | 2.5% | 4 |
| Motorcycle body and structure | 0.75 | 1.3% | 2 |
| Motorcycle brakes | 0.37 | 0.6% | 1 |
| Motorcycle tyres and wheels | 0.37 | 0.6% | 1 |
| Motorcycle reg plates and vin | 0.37 | 0.6% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Bsa C 15 has 16,781 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 C 15 has a mileage-adjusted failure rate of 4.11% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Bsa C 15 MOT Data
The Bsa C 15 is a rare vehicle in the UK, with 159 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 93.1% and a failure rate of 6.9%, which is well above the UK average of approximately 37%.
For Bsa C 15 owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle steering and suspension and motorcycle lighting and signalling 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 C 15 is likely to perform.
Motorcycle steering and suspension — 3.8% of failures
Motorcycle steering and suspension issues account for 3.8% of MOT failures on the Bsa C 15. 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 lighting and signalling — 2.5% of failures
Motorcycle lighting and signalling issues account for 2.5% of MOT failures on the Bsa C 15. 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 drive system — 1.9% of failures
Motorcycle drive system issues account for 1.9% of MOT failures on the Bsa C 15. 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 C 15?
Based on 159 MOT tests in our database, the Bsa C 15 has an overall pass rate of 93.1% (6.9% fail rate).
What are the most common MOT failures on a Bsa C 15?
The top 3 reasons a Bsa C 15 fails its MOT are: 1. Motorcycle steering and suspension (3.8%), 2. Motorcycle lighting and signalling (2.5%), 3. Motorcycle drive system (1.9%). Check these areas before booking your MOT.
Is the Bsa C 15 reliable?
With a 6.9% MOT failure rate, the C 15 is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Bsa C 15?
Based on failure data, focus on: Motorcycle steering and suspension (3.8%); Motorcycle lighting and signalling (2.5%); Motorcycle drive system (1.9%). 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.