Ford SIERRA - 1986
49.1 faults per 100 tests
Year average for all cars of 1986 is 241.8 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Ford SIERRA, model year 1986.
Sample size: 289 cars, 452 tests and 222 recorded faults.
0%
Less faults compared to the average car of same model year
Less faults compared to the average car of same model year
Quick summary
Total: 289 cars
The 1986 Ford Sierra has a significantly lower overall defect rate of 49 defects per 100 vehicles, compared to the yearly average of 240 defects per 100 vehicles, making it 80% better than average. When considering mileage, the model shows a notable increase in defects in the lower mileage brackets, particularly in the 0–31,000 miles category, where the defect rate is 317, contrasting with the average of 409. The Sierra excels particularly in the categories of brakes, steering, and visibility, where it exhibits far fewer defects—showing improvements of over 80% compared to the average. Overall, this model stands out positively in several key areas, contributing to its lower defect rate relative to its peers from the same year.
Cars by mileage segment
Total: 289 cars
More model years for Ford SIERRA
Other models from Ford
Categories
Brakes
▲ 83.4% better
14.6 faults / 100 tests
Year avg: 88.2 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Service brake efficiency: below minimum requirement
- Parking brake efficiency: below minimum requirement
- Brake hose ferrules: excessively corroded
- Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
Steering
▲ 75.0% better
7.5 faults / 100 tests
Year avg: 30.0 / 100 tests
- A steering ball joint: with excessive wear or free play
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Power steering fluid leaking or system malfunctioning
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
Visibility
▲ 67.4% better
7.1 faults / 100 tests
Year avg: 21.8 / 100 tests
- Wiper blade: missing or obviously not clearing the windscreen
- Wiper blade: defective
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 74.3% better
15.5 faults / 100 tests
Year avg: 60.2 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- The aim of a headlamp is not within limits laid down in the requirements
- A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
- A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
Wheels & Suspension
▲ 78.7% better
33.6 faults / 100 tests
Year avg: 157.4 / 100 tests
- Tyre tread depth not in accordance with the requirements
- A spring: or spring component fractured or seriously weakened
- A spring: or spring component fractured or seriously weakened
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A wheel bearing: excessively rough
Body/Structure
▲ 85.4% better
8.0 faults / 100 tests
Year avg: 54.7 / 100 tests
- Exhaust system has a major leak or is insecure
- A transmission shaft constant velocity joint boot: severely deteriorated
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
Equipment
▲ 84.0% better
2.7 faults / 100 tests
Year avg: 16.9 / 100 tests
- Seat belt buckle missing, damaged or not functioning as intended
- Audible warning:
Other
▲ 82.8% better
9.3 faults / 100 tests
Year avg: 54.1 / 100 tests
- Emissions levels exceed default limits
- Exhaust emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Exhaust noise levels in excess of those permitted
Fault rate by mileage segment
Model
Year average
* Metric: faults per 100 tests.
Most common faults (Top 10)
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 14
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 13
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 13
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 10
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 7
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 7
A wheel bearing: excessively rough
ADVISORY
Occurrences: 6
Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
ADVISORY
Occurrences: 6
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 6
Audible warning:
FAIL
Occurrences: 5
Serious faults (Top 10)
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 6
Audible warning:
FAIL
Occurrences: 5
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 5
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 4
Emissions levels exceed default limits
FAIL
Occurrences: 4
Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
FAIL
Occurrences: 4
Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 3
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 3
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 3
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 3