Ford Sierra MOT Failure Rate
Key Findings for the Ford Sierra
- Overall MOT failure rate: 14.8% — 13.2pp below the UK average (28%)
- Highest-risk component: Lamps & Electrics (3.9% failure risk)
- Most reliable age group: 15+ years (14.8% failure rate)
- Highest-risk age group: 15+ years (14.8% failure rate)
- Based on 14,877 official DVSA MOT tests
Failure Rate by Vehicle Age
How the Ford Sierra MOT failure rate changes with age:
| Age | Failure Rate | Tests | Worst Area |
|---|---|---|---|
| 15+ years | 14.8% | 14,836 | Lamps & Electrics |
Component Risk Breakdown
Which parts of the Ford Sierra are most likely to cause an MOT failure:
Ford Sierra by Age Group
See detailed MOT failure data for each age group:
What Ford Sierra Owners Should Watch For
Based on the MOT test data for the Ford Sierra, here are the key areas to pay attention to before your MOT:
- Lamps & Electrics (3.9% failure risk) — Walk around the car and check every bulb — headlights, brake lights, indicators, fog lights, and number plate lights. This is one of the cheapest and easiest fixes.
- Suspension (2.7% failure risk) — Look for leaking shock absorbers, worn bushes, and damaged springs. A bouncing or uneven ride often signals problems.
- Brakes (2.1% failure risk) — Check brake pad thickness, disc condition, and handbrake operation. Listen for grinding or squealing when braking.
Many of these issues are inexpensive to fix when caught early. A pre-MOT inspection at a local garage typically costs £20–£40 and can save you the cost of a retest (£15–£30) plus the inconvenience of a failed MOT.
Frequently Asked Questions
What is the MOT failure rate for a Ford Sierra?
The Ford Sierra has an overall MOT failure rate of 14.8%, based on 14,877 MOT tests recorded in the DVSA database. This is below the UK national average of approximately 28%.
What are the most common MOT failures on a Ford Sierra?
The most common areas for MOT failure on a Ford Sierra are:
- Lamps & Electrics — 3.9% failure risk
- Suspension — 2.7% failure risk
- Brakes — 2.1% failure risk
These component risks are weighted averages across all age and mileage bands in the dataset.
Is the Ford Sierra reliable for MOT?
Yes, the Ford Sierra performs better than average in MOT tests. Its 14.8% failure rate is well below the UK average of 28%, making it one of the more reliable options.
How does the Ford Sierra MOT failure rate change with age?
We have limited age-band data for this model. In general, MOT failure rates increase steadily with vehicle age as components wear. Vehicles over 10 years old typically have failure rates above 35%.
How can I reduce the risk of my Ford Sierra failing its MOT?
The most effective steps are: (1) Check all lights and bulbs before your test — lighting failures are the most common and cheapest to fix. (2) Inspect tyre tread depth and condition. (3) Test your windscreen washers and wipers. (4) Listen for unusual noises from brakes or suspension. (5) Consider a pre-MOT check at a local garage. You can also use our free prediction tool to get a personalised risk breakdown for your specific vehicle.
Where can I check the MOT history of a Ford Sierra?
You can check any vehicle's full MOT history for free on the official DVSA service. This shows all previous test results, advisory items, and failure reasons. AutoSafe goes further by analysing this data with AI to predict your future MOT outcome.
Check Your Specific Ford Sierra
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Other Ford Models
Compare the Ford Sierra MOT failure rate against other Ford models:
Similar Failure Rate Models
These models from other manufacturers have a similar MOT failure rate to the Ford Sierra:
Related Guides
- Top 10 MOT Failure Points & How to Avoid Them
- Pre-MOT Checklist: 15 Things to Check Before Your Test
- MOT Failure Rates by Car Make and Model
- How to Check MOT History
Data methodology: Failure rates are weighted averages across all mileage bands, calculated from official DVSA MOT test records. Only age/mileage combinations with 100+ tests are included. Component risks represent the probability of failure in each specific area. Data covers 142 million MOT tests across the UK.
Trust signals: Risk model: CatBoost v55 • Data source: DVSA Open Data (OGL v3) • Last updated: 2026-03-08 • Limitation: population averages; individual vehicle condition, service history and mileage may vary.
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