Proton Gls (1991)
1991 Proton Gls
CarHunch analysed 3,080 real MOT records for the 1991 Proton Gls. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1991 Proton GLS is a reliability catastrophe—just 3.4% pass first time against the UK average of 80%, meaning 96.6% of these cars fail their MOT. With a median CarHunch score of 50 and virtually no dangerous defects on record (0.3%), the failures aren't safety-critical, but they're relentless.
At 81,874 miles median, these vehicles are showing their age after 33 years, and the 0.06 average failures and 0.1 advisories per car suggest persistent wear across multiple systems rather than isolated problems. If you're considering one, expect significant repair costs and budget for a thorough pre-purchase inspection—this model simply isn't worth the ongoing hassle.
What to check before buying a 1991 Proton Gls
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Proton Gls
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (100%) | 3,079 | 3.4% | 0.06 |
| Diesel (0%) | 1 | 0% | 0 |
Mileage Distribution
Most 1991 Proton Gls vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 1991 Proton Gls vehicles fall between 64,581 and 102,202 miles.
MOT History Averages
Most Common MOT Issues — 1991 Proton Gls
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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19.4%
Offside Rear Tyre worn close to the legal limit
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15.4%
Offside Front Tyre worn close to the legal limit
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15.4%
Offside Front constant velocity joint gaiter split
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14.3%
Nearside Rear Tyre worn close to the legal limit
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13.7%
Nearside Front Tyre worn close to the legal limit
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13.1%
Exhaust emissions carbon monoxide content excessive
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12%
Offside Front Tyre tread depth below requirements of 1.6mm
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10.9%
Nearside Front constant velocity joint gaiter split
Data covers a 3-year window centred on 1991. Counts include advisories and failures.
Found a specific Proton Gls?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.