Should I check the MOT history before buying a 1991 Ford Sierra?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 1991 Ford Sierra?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 1991 Ford Sierra?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 1991 Ford Sierra reliable?

Based on MOT data from 10,295 vehicles, the 1991 Ford Sierra has a first-time MOT pass rate of 64.7%, indicating average reliability for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 1991 Ford Sierra?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Ford Sierra (1991)

Q: What are common problems with the 1991 Ford Sierra?

The most frequently recorded MOT issues on the 1991 Ford Sierra are: Nearside Rear Suspension component mounting prescribed area is excessively corroded (20.9% of vehicles), Offside Rear Suspension component mounting prescribed area is excessively corroded (19.7% of vehicles), Oil leak (17.7% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

10,295 real MOT outcomes analysed • 64.7% first-time pass rate

1991 Ford Sierra

CarHunch analysed 10,295 real MOT records for the 1991 Ford Sierra. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

On this page

AI Analysis Reliability Overview Common Issues Check a Specific Reg Petrol vs Diesel Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 1991 Ford Sierra has a below-average first-time pass rate (64.7% vs ~80% UK average) — check the specific vehicle's full MOT history carefully before buying.

⚠️ About 1 in 12 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

64.7%

UK average ~80%

Below average

Dangerous (ever)

9.6%

At least once in MOT history

Check this vehicle

Avg failures / car

1.37

Over 4 tests on record

High

Typical mileage

47k

Middle half: 25k–72k

For context

⚠️ Below average. More vehicles in this cohort fail their first MOT than typical. Scrutinise this vehicle's history — look for recurring issues, not just the latest result.

🔧 Expect consumable spend. An average of 3.7 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 10,295 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Buyer beware — pass it on

What tends to go wrong

Across 10,295 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Suspension & steering 20.9%

Nearside Rear Suspension component mounting prescribed area is excessively corroded · Offside Rear Suspension component mounting prescribed area is excessively corroded · Offside Rear Subframe mounting prescribed area is excessively corroded

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Other issues 17.7%

Oil leak · Fuel pipe/s corroded

Tyre wear 13.8%

Nearside Rear Tyre worn close to the legal limit · Offside Rear Tyre worn close to the legal limit · Nearside Front Tyre worn close to the legal limit · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Brake wear 13.6%

Offside Front Brake hose slightly deteriorated · Nearside Front Brake hose slightly deteriorated · Parking brake: efficiency below requirements · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Exhaust & emissions 12.3%

Exhaust emissions carbon monoxide content excessive

Seat belts 10.6%

Offside Seat belt anchorage prescribed area is excessively corroded · Nearside Seat belt anchorage prescribed area is excessively corroded

Data covers a 3-year window centred on 1991.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 10,295 Ford Sierra cars.

Petrol vs Diesel

Pass rate difference of 2.1 percentage points — worth knowing if you're choosing between the two.

64.8%

Petrol

9,611 vehicles

62.7%

Diesel

674 vehicles

Before you buy a 1991 Ford Sierra

Based on MOT data from 10,295 vehicles — here's what to check.

📋 Check the full MOT history. 9.6% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (93%)	9,611	64.8%	1.38
Diesel (7%)	674	62.7%	1.12

Colour Breakdown

Based on 58,664 Ford Sierra vehicles registered in the UK — across all years. From DVLA registration records.

Red 26.8%

15,750

Blue 25.3%

14,822

White 18.2%

10,676

Grey 9.8%

5,761

Silver 9.4%

5,531

Black 6%

3,491

Green 2.2%

1,307

Gold 1.1%

619

Yellow 0.4%

216

Cream 0.3%

202

Maroon 0.3%

161

Beige 0.2%

128

Mileage Distribution

Most 1991 Ford Sierra vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

46,911

typical

24,984

low mileage

72,052

high mileage

Half of all 1991 Ford Sierra vehicles fall between 24,984 and 72,052 miles.

Is the mileage you're seeing normal?

✓ Under 24,984 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 24,984–72,052 miles — normal for age. This is where most 1991 Ford Sierras sit.

⚠ Over 97,270 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

1991 Ford Sierra — Still on the Road

Numbers are thinning — 51% of 1991 Ford Sierras are still active.

276 vehicles still getting MOTs in 2025 — 51% of the peak remain.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

Avg MOT tests per vehicle

1.37

Avg failures per vehicle

3.7

Avg advisories per vehicle

Other model years — Ford Sierra: All Sierra years → Which year to buy? →

1983 1984 1985 1986 1987 1988 1989 1990 1992 1993

Or browse all models: Ford →

Compare with another model

See how the 1991 Ford Sierra stacks up against a rival.

Buyer beware — pass it on