Proton Gl MOT Pass Rate
Overall pass rate across all manufacture years, based on 653 real MOT test results. Failure rate: 45.3%.
Data from official DVSA MOT testing records
Proton Gl MOT Reliability Overview
The Proton Gl is a rare vehicle in the UK, with 653 MOT test results recorded in our database spanning 6 manufacture years. It has an overall MOT pass rate of 54.7% and a failure rate of 45.3%, which is below the UK average of approximately 37%.
Based on this data, the Proton Gl earns a "Poor" reliability rating. The average Proton Gl presents for MOT with approximately 75,103 miles on the clock. Manufacture year matters: 1991 models achieve the highest pass rate at 60.6%, while 1995 models have the lowest at 37.5%. This 23.1 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Proton Gl is Suspension, affecting 31.4% 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 Lamps, Reflectors and Electrical Equipment at 19.0%. Tyres rounds out the top three at 16.2%. 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
Best Year to Buy
📈 How Each Vintage Ages
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 | Suspension | 50.1% | 327 |
| 2 | Lamps, Reflectors And Electrical Equipment | 29.0% | 189 |
| 3 | Tyres | 24.0% | 157 |
| 4 | Brakes | 21.4% | 140 |
| 5 | Exhaust, Fuel And Emissions | 19.1% | 125 |
| 6 | Driver's View Of The Road | 15.0% | 98 |
| 7 | Steering | 11.5% | 75 |
| 8 | Body, Structure And General Items | 6.1% | 40 |
| 9 | Seat Belts And Supplementary Restraint Systems | 5.8% | 38 |
| 10 | Registration Plates And Vin | 2.9% | 19 |
| 11 | Body, Chassis, Structure | 1.1% | 7 |
| 12 | Items Not Tested | 0.9% | 6 |
| 13 | Visibility | 0.5% | 3 |
| 14 | Non-component Advisories | 0.2% | 1 |
Failures per 10,000 Miles
avg. 75,103 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 |
|---|---|---|---|
| Suspension | 6.67 | 50.1% | 327 |
| Lamps & Electrical | 3.85 | 29.0% | 189 |
| Tyres | 3.20 | 24.0% | 157 |
| Brakes | 2.85 | 21.4% | 140 |
| Emissions & Exhaust | 2.55 | 19.1% | 125 |
| Visibility | 2.06 | 15.5% | 101 |
| Steering | 1.53 | 11.5% | 75 |
| Body & Structure | 0.96 | 7.2% | 47 |
| Seat Belts | 0.77 | 5.8% | 38 |
| Registration Plates and VIN | 0.39 | 2.9% | 19 |
| Items Not Tested | 0.12 | 0.9% | 6 |
| Non-component advisories | 0.02 | 0.2% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Proton Gl has 75,103 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 Gl has a mileage-adjusted failure rate of 6.03% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Proton Gl MOT Data
The Proton Gl is a rare vehicle in the UK, with 653 MOT test results recorded in our database spanning 6 manufacture years. It has an overall MOT pass rate of 54.7% and a failure rate of 45.3%, which is below the UK average of approximately 37%.
For Proton Gl owners, these results suggest above-average failure risk — thorough pre-MOT checks are recommended. Focus your pre-MOT checks on suspension 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 Gl is likely to perform.
Suspension — 31.4% of failures
Suspension issues account for 31.4% of MOT failures on the Proton Gl. 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.
Lamps, Reflectors and Electrical Equipment — 19.0% of failures
Lamps, Reflectors and Electrical Equipment issues account for 19.0% of MOT failures on the Proton Gl. 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.
Tyres — 16.2% of failures
Tyres issues account for 16.2% of MOT failures on the Proton Gl. 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 Proton Gl?
Based on 653 MOT tests in our database, the Proton Gl has an overall pass rate of 54.7% (45.3% fail rate).
What are the most common MOT failures on a Proton Gl?
The top 3 reasons a Proton Gl fails its MOT are: 1. Suspension (31.4%), 2. Lamps, Reflectors and Electrical Equipment (19.0%), 3. Tyres (16.2%). Check these areas before booking your MOT.
Is the Proton Gl reliable?
With a 45.3% MOT failure rate, the Gl is less reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Proton Gl?
Based on failure data, focus on: Suspension (31.4%); Lamps, Reflectors and Electrical Equipment (19.0%); Tyres (16.2%). 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.