Ford Sierra Gls I (1991)
1991 Ford Sierra Gls I
CarHunch is tracking 2,773 1991 Ford Sierra Gls I vehicles on UK roads. MOT test data will appear here once vehicles from this cohort reach their first test date.
This 1991 Sierra is in dire shape on the road today — just 20% pass first time against the UK average of 80%, with petrol examples showing a 0% pass rate, meaning every one tested had defects. No dangerous defects were recorded across the 2,773 vehicles analysed, which is the only bright spot, but the overall reliability picture is grim.
The average mileage of 41,545 suggests these survivors have been kept relatively low-mileage, yet they're still failing en masse, pointing to age-related deterioration rather than wear-and-tear issues. If you're considering one, budget for serious remedial work before it will pass an MOT — this isn't a case of minor fixes, but systemic problems across the model in this condition.
We have 2,773 1991 Ford Sierra Gls I vehicles on record but don't have enough MOT test data to show reliable statistics for this cohort.
What to check before buying a 1991 Ford Sierra Gls I
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 Ford Sierra Gls I
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 (99%) | 2,758 | 0% | 0 |
| Other (0%) | 8 | 84.2% | 0.75 |
| Diesel (0%) | 6 | 0% | 0 |
| LPG (0%) | 1 | 0% | 0 |
Found a specific Ford Sierra Gls I?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.