Vauxhall Signum
Reliability, running costs, and MOT data across 6 years from 2,233 real MOT tests.
Avg Pass Rate
71%
Total Tests
2,233
Best Year
2003 (77%)
Years Covered
6
How reliable is the Vauxhall Signum?
Vauxhall Signum by Year
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About the Vauxhall Signum
The Vauxhall Signum has been tested 2,233 times in 2024 MOT data across 6 model years (2003 to 2008), with an average pass rate of 71%. That's 11 points below the national average of 82%, so check the year-by-year data carefully before buying. Available as petrol and diesel.
Best and Worst Years
The 2003 model is the most reliable with a 77% pass rate from 111 tests. The 2008 model has the lowest at 63%. The 14 point spread between years means reliability varies somewhat, but no year is dramatically different.
Reliability Trend
The VAUXHALL SIGNUM has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Mileage Across Years
The oldest model in our data (2003) averages 111,342 miles, while the newest (2008) averages 130,218 miles. Older models have covered serious mileage, so suspension and drivetrain wear are worth checking.
Compared to the Vauxhall brand average of 84%, the Signum is 13 points lower, placing it among the less reliable Vauxhall models.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.