Ford Sierra Xr4 I MOT Pass Rate
Overall pass rate across all manufacture years, based on 41 real MOT test results. Failure rate: 34.1%.
Data from official DVSA MOT testing records
Ford Sierra Xr4 I MOT Reliability Overview
The Ford Sierra Xr4 I is a rare vehicle in the UK, with 41 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 65.9% and a failure rate of 34.1%, which is slightly above the UK average of approximately 37%.
Based on this data, the Ford Sierra Xr4 I earns a "Good" reliability rating. The average Ford Sierra Xr4 I presents for MOT with approximately 63,477 miles on the clock.
The most common MOT failure for the Ford Sierra Xr4 I is Lamps, Reflectors and Electrical Equipment, affecting 48.8% of all tests. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. The second most common issue is Suspension at 22.0%. Exhaust, Fuel and Emissions rounds out the top three at 12.2%. Together, these top 3 failure categories account for a significant portion of all MOT failures for this model.
Top failures across all manufacture years combined. Individual year pages may show different top failures.
What Fails Most
* High Fail Rate badge indicates an MOT pass rate below 65% (failure rate above 35%).
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Lamps, Reflectors And Electrical Equipment | 87.8% | 36 |
| 2 | Suspension | 34.1% | 14 |
| 3 | Brakes | 22.0% | 9 |
| 4 | Driver's View Of The Road | 19.5% | 8 |
| 5 | Tyres | 17.1% | 7 |
| 6 | Exhaust, Fuel And Emissions | 12.2% | 5 |
| 7 | Steering | 7.3% | 3 |
| 8 | Seat Belts And Supplementary Restraint Systems | 7.3% | 3 |
| 9 | Road Wheels | 7.3% | 3 |
| 10 | Registration Plates And Vin | 4.9% | 2 |
| 11 | Body, Structure And General Items | 4.9% | 2 |
Failures per 10,000 Miles
avg. 63,477 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Lamps & Electrical | 13.83 | 87.8% | 36 |
| Suspension | 5.38 | 34.1% | 14 |
| Brakes | 3.46 | 22.0% | 9 |
| Visibility | 3.07 | 19.5% | 8 |
| Tyres | 2.69 | 17.1% | 7 |
| Emissions & Exhaust | 1.92 | 12.2% | 5 |
| Steering | 1.15 | 7.3% | 3 |
| Seat Belts | 1.15 | 7.3% | 3 |
| Wheels | 1.15 | 7.3% | 3 |
| Registration Plates and VIN | 0.77 | 4.9% | 2 |
| Body & Structure | 0.77 | 4.9% | 2 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Ford Sierra Xr4 I has 63,477 miles when tested for MOT.
📊 Mileage-Adjusted Failure Rate
How often this car fails MOT relative to how much it's driven — a fairer comparison than raw pass rate.
The Ford Sierra Xr4 I has a mileage-adjusted failure rate of 5.37% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Ford Sierra Xr4 I MOT Data
The Ford Sierra Xr4 I is a rare vehicle in the UK, with 41 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 65.9% and a failure rate of 34.1%, which is slightly above the UK average of approximately 37%.
For Ford Sierra Xr4 I owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on lamps, reflectors and electrical equipment and suspension for the best chance of a first-time pass. Use our detailed year-by-year breakdown and failure analysis below to understand how your specific Sierra Xr4 I is likely to perform.
Lamps, Reflectors and Electrical Equipment — 48.8% of failures
Lamps, Reflectors and Electrical Equipment issues account for 48.8% of MOT failures on the Ford Sierra Xr4 I. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Suspension — 22.0% of failures
Suspension issues account for 22.0% of MOT failures on the Ford Sierra Xr4 I. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Exhaust, Fuel and Emissions — 12.2% of failures
Exhaust, Fuel and Emissions issues account for 12.2% of MOT failures on the Ford Sierra Xr4 I. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Frequently Asked Questions
What is the MOT pass rate for the Ford Sierra Xr4 I?
Based on 41 (based on limited data) MOT tests in our database, the Ford Sierra Xr4 I has an overall pass rate of 65.9% (34.1% fail rate).
What are the most common MOT failures on a Ford Sierra Xr4 I?
The top 3 reasons a Ford Sierra Xr4 I fails its MOT are: 1. Lamps, Reflectors and Electrical Equipment (48.8%), 2. Suspension (22.0%), 3. Exhaust, Fuel and Emissions (12.2%). Check these areas before booking your MOT.
Is the Ford Sierra Xr4 I reliable?
With a 34.1% MOT failure rate, the Sierra Xr4 I is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Ford Sierra Xr4 I?
Based on failure data, focus on: Lamps, Reflectors and Electrical Equipment (48.8%); Suspension (22.0%); Exhaust, Fuel and Emissions (12.2%). These are the areas most likely to cause a fail. Also check all lights, tyres (minimum 1.6mm tread), and windscreen condition — these are quick wins that apply to all cars.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.