Ford Sierra
Reliability, estimated running costs, and MOT data across 4 model years from 2,817 MOT tests in 2024.
Avg Pass Rate
87%
Total Tests
2,817
Highest Pass Rate
1990 (88%)
Years Covered
4
About the Ford Sierra
The Ford Sierra was MOT tested 2,817 times in 2024 (DVSA data, retests included) across 4 model years (1990 to 1993), with an average pass rate of 87%. That's slightly above the average of 82% across all models in our data. Our records list petrol versions.
Best and Worst Years
Of the years with at least 100 tests, the 1990 model has the highest pass rate at 88% from 903 tests. The 1992 model has the lowest at 84%. With just a 4 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Reliability Trend
The Ford Sierra has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Mileage Across Years
The oldest model in our data (1990) averages 49,816 miles, while the newest (1993) averages 62,299 miles.
Estimated Running Costs
Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.
Full 1993 detailsHow reliable is the Ford Sierra?
Ford Sierra by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Ford Sierra
Is the Ford Sierra reliable?
Across its 4 model years in our data (1990 to 1993), the Ford Sierra averages an 87% MOT pass rate, from 2,817 tests (DVSA MOT data for tests in 2024, retests included). That's 5 points above the average of 82% across all models in the same data. The 1990 model has the highest pass rate of the years with at least 100 tests, at 88%.
Which year Ford Sierra has the best MOT pass rate?
Of the years with at least 100 tests, the 1990 Ford Sierra has the highest MOT pass rate at 88%, while the 1992 model has the lowest at 84%, a 4 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Are newer Ford Sierras more reliable?
The Ford Sierra has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
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