CarVerify

Free Car Check

B21 COS

1986 Ford Sierra

Blue Petrol 1993cc
Search another vehicle

MOT Status

Valid
Expires10 Mar 2027
Tests7 (5 pass, 2 fail)
Pass rate71.4%

Mileage

74,390 mi
Last recorded74,390 miles
Recorded on11 Mar 2026
Typical for 1986 Ford Sierra57,627 mi

Above average mileage for this year

4 checks still locked for this Ford
Stolen
Finance
Write-off
Keepers
Unlock full report — £4.99
Instant £30k guarantee
or single check £9.99

Not all car check providers offer a guarantee. Don't risk buying from services that can't back their data. CarVerify reports include a £30,000 finance data guarantee.

Vehicle Details

RegistrationB21 COS
MakeFord
ModelSierra
Year1986
ColourBlue
Fuel typePetrol
Engine1,993cc

All premium checks include

50+ data points
Finance Check (Experian) Insurance Write-off Salvage Auction Stolen Check Previous Owners Ex-Taxi, Police, NHS Mileage Anomaly Import / Export Scrapped Check Plate Changes

MOT History

5 pass 2 fail
Pass 11 Mar 2026 74,390 miles
Pass 7 Mar 2025 73,908 miles
Fail 7 Mar 2025 73,908 miles

Offside Headlamp aim too high (4.1.2 (a))

Registration plate lamp inoperative in the case of a single lamp or all lamps (4.7.1 (b) (ii))

Stop lamp(s) remains on when the brakes are released (4.3.2 (a) (iii)) DANGEROUS

Pass 9 Jan 2024 73,065 miles
Pass 3 Feb 2023 71,853 miles
Fail 6 Jan 2023 71,799 miles

Nearside Front Windscreen in an unacceptable condition (3.2 (c) (i))

Battery insecure but not likely to fall from carrier engine bay (4.13 (a) (i))

Oil leak, but not excessive (8.4.1 (a) (i))

Rear Brake pipe corroded, covered in grease or other material covered in paint (1.1.11 (c))

underbody mot testable items are corroded

Pass 10 Nov 2021 69,914 miles

How Reliable is the Ford Sierra?

Based on 235,897 MOT tests across 50,859 vehicles.

69.3%
Pass Rate
1,731
Miles/Year
43
Year Lifespan
50,859
On UK Roads

Top MOT Failure Points

Suspension component mounting prescribed area is excessively corroded 24,833
Seat belt anchorage prescribed area is excessively corroded 20,240
Tyre tread depth below requirements of 1.6mm 12,426
Subframe mounting prescribed area is excessively corroded 8,585
Brake pipe excessively corroded 7,976
Full Ford Sierra reliability report

Don't risk it. Know before you buy.

Not all vehicle check providers are the same. Some don't offer a data guarantee, which means if their information is wrong, you're on your own. Every CarVerify report is backed by a £30,000 finance data guarantee.

£30k guarantee Instant results Cancel anytime

B21 COS is a 1986 Ford Sierra in Blue with a 1,993cc petrol engine. This vehicle has been through 7 MOT tests with a personal pass rate of 71.4%.

Across all 1986 Ford Sierra models, the average MOT pass rate is 80.3% with a typical mileage of 57,627 miles. This particular vehicle has a lower pass rate than the average for its year, which may indicate maintenance issues worth investigating.

The most common reason a Ford Sierra fails its MOT is suspension component mounting prescribed area is excessively corroded, accounting for 24,833 recorded failures. If you're considering buying B21 COS, it's worth having these areas checked by a mechanic before committing.

The Ford Sierra typically stays on UK roads for around 43 years. At 40 years old, this Ford Sierra is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of B21 COS?

You can check the full history of B21 COS by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was B21 COS registered?

B21 COS is a 1986 Ford Sierra, first registered on 26 August 1986.

Is B21 COS safe to buy?

The MOT history for B21 COS shows 7 tests with a 71.4% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does B21 COS have outstanding finance?

Finance checks require a premium vehicle report. This checks against all major UK finance providers to see if there is any outstanding finance on B21 COS. If you buy a car with outstanding finance, the finance company can repossess it.

No warranty or guarantee of accuracy is provided for any free data on this page. The data guarantee applies only to information obtained through the purchase of a full check.