1991 Ford Sierra: common problems and MOT failures
What MOT testers find on the Ford Sierra first registered in 1991: we looked at the 989 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.
Common 1991 Ford Sierra MOT failures and advisories
The share of 1991 Ford Sierra MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Brakes15% of testsRough price £150–£350
At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
- Suspension14% of testsRough price £120–£400
At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
- Lights and electrics11% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Oil and fluid leaks10% of testsRough price £80–£600
At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.
- Rust and bodywork7% of testsRough price £150–£1,000
At the viewing: Check the sills, wheel arches and underneath for rust, and look along the panels for uneven gaps or paint.
- Exhaust and emissions6% of testsRough price £100–£1,200
At the viewing: Look for black soot in the tailpipe, listen for blowing from the exhaust and check for engine or DPF warning lights.
Questions to ask the seller before buying a 1991 Ford Sierra
Ask before you travel to see it. A seller who knows the car will have answers, and receipts.
- Can I see the service history and receipts for any big jobs?
Looking at a Ford Sierra?
Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.
Other years
Every year of the Ford Sierra compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 1993 | 287 | Suspension 16% |
| 1992 | 1,025 | Suspension 17% |
| 1990 | 1,188 | Brakes 13% |
| 1989 | – | Too few tests |
| 1988 | – | Too few tests |
| 1987 | – | Too few tests |
| 1986 | – | Too few tests |
| 1985 | – | Too few tests |
| 1984 | – | Too few tests |
| 1983 | – | Too few tests |
| 1982 | – | Too few tests |
Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Ford Sierra cars first registered in 1991. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score