Ford Sierra
Reliability, running costs, and MOT data across 4 years from 2,817 real MOT tests.
Avg Pass Rate
87%
Total Tests
2,817
Best Year
1990 (88%)
Years Covered
4
How reliable is the Ford Sierra?
Ford Sierra by Year
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About the Ford Sierra
The Ford Sierra has been tested 2,817 times in 2024 MOT data across 4 model years (1990 to 1993), with an average pass rate of 87%. That's slightly above the national average of 82%. Available as petrol.
Best and Worst Years
The 1990 model is the most reliable with a 88% pass rate from 903 tests. The 1992 model has the lowest at 84%. With just a 4 point spread, the Sierra is consistently reliable regardless of year.
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.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.