Proton Persona Sei MOT Pass Rate
Overall pass rate across all manufacture years, based on 90 real MOT test results. Failure rate: 58.9%.
Data from official DVSA MOT testing records
Proton Persona Sei MOT Reliability Overview
The Proton Persona Sei is a rare vehicle in the UK, with 90 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 41.1% and a failure rate of 58.9%, which is significantly below the UK average of approximately 37%.
Based on this data, the Proton Persona Sei earns a "Very Poor" reliability rating. The average Proton Persona Sei presents for MOT with approximately 84,175 miles on the clock.
The most common MOT failure for the Proton Persona Sei is Brakes, affecting 40.0% 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 Lamps, Reflectors and Electrical Equipment at 36.7%. Suspension rounds out the top three at 23.3%. 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 | Brakes | 104.4% | 94 |
| 2 | Lamps, Reflectors And Electrical Equipment | 61.1% | 55 |
| 3 | Suspension | 53.3% | 48 |
| 4 | Steering | 32.2% | 29 |
| 5 | Exhaust, Fuel And Emissions | 32.2% | 29 |
| 6 | Tyres | 31.1% | 28 |
| 7 | Driver's View Of The Road | 26.7% | 24 |
| 8 | Body, Structure And General Items | 3.3% | 3 |
| 9 | Seat Belts And Supplementary Restraint Systems | 2.2% | 2 |
| 10 | Items Not Tested | 2.2% | 2 |
| 11 | Registration Plates And Vin | 2.2% | 2 |
Failures per 10,000 Miles
avg. 84,175 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 |
|---|---|---|---|
| Brakes | 12.41 | 104.4% | 94 |
| Lamps & Electrical | 7.26 | 61.1% | 55 |
| Suspension | 6.34 | 53.3% | 48 |
| Steering | 3.83 | 32.2% | 29 |
| Emissions & Exhaust | 3.83 | 32.2% | 29 |
| Tyres | 3.70 | 31.1% | 28 |
| Visibility | 3.17 | 26.7% | 24 |
| Body & Structure | 0.40 | 3.3% | 3 |
| Seat Belts | 0.26 | 2.2% | 2 |
| Items Not Tested | 0.26 | 2.2% | 2 |
| Registration Plates and VIN | 0.26 | 2.2% | 2 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Proton Persona Sei has 84,175 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 Proton Persona Sei has a mileage-adjusted failure rate of 7.00% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Proton Persona Sei MOT Data
The Proton Persona Sei is a rare vehicle in the UK, with 90 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 41.1% and a failure rate of 58.9%, which is significantly below the UK average of approximately 37%.
For Proton Persona Sei owners, these results suggest above-average failure risk — thorough pre-MOT checks are recommended. Focus your pre-MOT checks on brakes and lamps, reflectors and electrical equipment 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 Persona Sei is likely to perform.
Brakes — 40.0% of failures
Brakes issues account for 40.0% of MOT failures on the Proton Persona Sei. 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).
Lamps, Reflectors and Electrical Equipment — 36.7% of failures
Lamps, Reflectors and Electrical Equipment issues account for 36.7% of MOT failures on the Proton Persona Sei. 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.
Suspension — 23.3% of failures
Suspension issues account for 23.3% of MOT failures on the Proton Persona Sei. 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 Proton Persona Sei?
Based on 90 (based on limited data) MOT tests in our database, the Proton Persona Sei has an overall pass rate of 41.1% (58.9% fail rate).
What are the most common MOT failures on a Proton Persona Sei?
The top 3 reasons a Proton Persona Sei fails its MOT are: 1. Brakes (40.0%), 2. Lamps, Reflectors and Electrical Equipment (36.7%), 3. Suspension (23.3%). Check these areas before booking your MOT.
Is the Proton Persona Sei reliable?
With a 58.9% MOT failure rate, the Persona Sei is less reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Proton Persona Sei?
Based on failure data, focus on: Brakes (40.0%); Lamps, Reflectors and Electrical Equipment (36.7%); Suspension (23.3%). 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.