Ford SIERRA - 1984
103.6 faults per 100 tests
Year average for all cars of 1984 is 236.2 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Ford SIERRA, model year 1984.
Sample size: 138 cars, 193 tests and 200 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: 138 cars
The 1984 Ford Sierra has a significantly lower overall defect rate, with 104 defects per 100 vehicles compared to the yearly average of 235 per 100, marking a 56% improvement. Notably, the Sierra excels in several specific categories, particularly in brakes and steering, where it has a 59% and 72% lower defect rate compared to the average, respectively. The data also shows a trend of increasing defects with mileage, but the Sierra maintains relatively consistent performance across different mileage segments. Overall, this model stands out for its reliability in critical areas such as brakes and steering, making it a better choice compared to the average car from the same year.
Cars by mileage segment
Total: 138 cars
More model years for Ford SIERRA
Other models from Ford
Categories
Brakes
▲ 59.1% better
33.2 faults / 100 tests
Year avg: 81.2 / 100 tests
- Brake pipe: inadequately clipped or supported
- Brake hose damaged and likely to fail
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake pipe: inadequately clipped or supported
- Brake pipe damaged or excessively corroded
Steering
▲ 71.9% better
8.3 faults / 100 tests
Year avg: 29.5 / 100 tests
- Excessive movement of centre of steering wheel up or down
- Power steering fluid: level below minimum mark
- Power steering fluid leaking or system malfunctioning
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
Visibility
▲ 48.6% better
11.4 faults / 100 tests
Year avg: 22.2 / 100 tests
- 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
Lights & Electrics
▲ 32.0% better
41.5 faults / 100 tests
Year avg: 61.0 / 100 tests
- Headlamp reflector or lens: slightly defective
- Beam image obviously incorrect
- A lamp adversely affected by the operation of any other lamp
- A direction indicator lamp adversely affected by the operation of any other lamp
- The aim of a headlamp is not within limits laid down in the requirements
Wheels & Suspension
▲ 65.6% better
53.9 faults / 100 tests
Year avg: 156.5 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A suspension pin, bush, joint or bearing: excessively worn
- Tyre tread depth not in accordance with the requirements
- A spring: or spring component fractured or seriously weakened
- The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
Body/Structure
▲ 47.6% better
26.9 faults / 100 tests
Year avg: 51.3 / 100 tests
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Exhaust system has a major leak or is insecure
- Body, cab or chassis: excessively corroded at mounting points
- Exhaust system has a major leak or is insecure
- Fuel tank, pipe or hose: insecure
Equipment
▲ 90.0% better
2.1 faults / 100 tests
Year avg: 20.9 / 100 tests
- Audible warning:
Other
▲ 39.7% better
30.1 faults / 100 tests
Year avg: 49.9 / 100 tests
- Emissions levels exceed default limits
- Exhaust noise levels in excess of those permitted
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- An induction or exhaust leak that could affect emissions levels
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: 24
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 13
Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
ADVISORY
Occurrences: 10
Headlamp reflector or lens: slightly defective
MINOR
Occurrences: 9
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 9
Brake pipe: inadequately clipped or supported
ADVISORY
Occurrences: 8
Exhaust system has a major leak or is insecure
ADVISORY
Occurrences: 7
Brake pipe: inadequately clipped or supported
MINOR
Occurrences: 6
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 6
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 5
Serious faults (Top 10)
A direction indicator lamp adversely affected by the operation of any other lamp
FAIL
Occurrences: 5
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 5
Brake hose damaged and likely to fail
FAIL
Occurrences: 4
The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
FAIL
Occurrences: 4
Beam image obviously incorrect
FAIL
Occurrences: 4
Exhaust system has a major leak or is insecure
FAIL
Occurrences: 3
Emissions levels exceed default limits
FAIL
Occurrences: 3
Actuator leaking and: braking performance not affected
FAIL
Occurrences: 2
Audible warning:
FAIL
Occurrences: 2
A lamp adversely affected by the operation of any other lamp
FAIL
Occurrences: 2