Norton P11 MOT Pass Rate
Overall pass rate across all manufacture years, based on 143 real MOT test results. Failure rate: 7.0%.
Data from official DVSA MOT testing records
Norton P11 MOT Reliability Overview
The Norton P11 is a rare vehicle in the UK, with 143 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 93.0% and a failure rate of 7.0%, which is well above the UK average of approximately 37%.
Based on this data, the Norton P11 earns a "Excellent" reliability rating. The average Norton P11 presents for MOT with approximately 13,067 miles on the clock. Manufacture year matters: 1967 models achieve the highest pass rate at 93.1%, while 1968 models have the lowest at 91.1%. This 2.0 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Norton P11 is Motorcycle lighting and signalling, affecting 7.0% 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 fuel and exhaust at 2.1%. Motorcycle steering and suspension rounds out the top three at 0.7%. 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 Lighting And Signalling | 7.0% | 10 |
| 2 | Motorcycle Fuel And Exhaust | 2.8% | 4 |
| 3 | Motorcycle Steering And Suspension | 0.7% | 1 |
| 4 | Motorcycle Drive System | 0.7% | 1 |
Failures per 10,000 Miles
avg. 13,067 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 | 5.35 | 7.0% | 10 |
| Motorcycle fuel and exhaust | 2.14 | 2.8% | 4 |
| Motorcycle steering and suspension | 0.54 | 0.7% | 1 |
| Motorcycle drive system | 0.54 | 0.7% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Norton P11 has 13,067 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 Norton P11 has a mileage-adjusted failure rate of 5.36% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Norton P11 MOT Data
The Norton P11 is a rare vehicle in the UK, with 143 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 93.0% and a failure rate of 7.0%, which is well above the UK average of approximately 37%.
For Norton P11 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 fuel and exhaust 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 P11 is likely to perform.
Motorcycle lighting and signalling — 7.0% of failures
Motorcycle lighting and signalling issues account for 7.0% of MOT failures on the Norton P11. 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 fuel and exhaust — 2.1% of failures
Motorcycle fuel and exhaust issues account for 2.1% of MOT failures on the Norton P11. Motorcycle fuel and exhaust 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 steering and suspension — 0.7% of failures
Motorcycle steering and suspension issues account for 0.7% of MOT failures on the Norton P11. 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 Norton P11?
Based on 143 MOT tests in our database, the Norton P11 has an overall pass rate of 93.0% (7.0% fail rate).
What are the most common MOT failures on a Norton P11?
The top 3 reasons a Norton P11 fails its MOT are: 1. Motorcycle lighting and signalling (7.0%), 2. Motorcycle fuel and exhaust (2.1%), 3. Motorcycle steering and suspension (0.7%). Check these areas before booking your MOT.
Is the Norton P11 reliable?
With a 7.0% MOT failure rate, the P11 is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Norton P11?
Based on failure data, focus on: Motorcycle lighting and signalling (7.0%); Motorcycle fuel and exhaust (2.1%); Motorcycle steering and suspension (0.7%). 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.