Vauxhall Signum
Reliability, estimated running costs, and MOT data across 6 model years from 2,233 MOT tests in 2024.
Avg Pass Rate
71%
Total Tests
2,233
Highest Pass Rate
2003 (77%)
Years Covered
6
About the Vauxhall Signum
The Vauxhall Signum was MOT tested 2,233 times in 2024 (DVSA data, retests included) across 6 model years (2003 to 2008), with an average pass rate of 71%. That's 11 points below the average of 82% across all models in our data, so check the year-by-year data carefully before buying. Our records list petrol and diesel versions.
Best and Worst Years
Of the years with at least 100 tests, the 2003 model has the highest pass rate at 77% from 111 tests. The 2004 model has the lowest at 67%. The 10 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.
Reliability Trend
The Vauxhall Signum has maintained consistent MOT pass rates across model years, varying by only 1 percentage point.
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.
Estimated Running Costs
Higher due to low pass rate
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 2008 detailsHow reliable is the Vauxhall Signum?
Vauxhall Signum by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Vauxhall Signum
Is the Vauxhall Signum reliable?
Across its 6 model years in our data (2003 to 2008), the Vauxhall Signum averages a 71% MOT pass rate, from 2,233 tests (DVSA MOT data for tests in 2024, retests included). That's 11 points below the average of 82% across all models in the same data. The 2003 model has the highest pass rate of the years with at least 100 tests, at 77%.
Which year Vauxhall Signum has the best MOT pass rate?
Of the years with at least 100 tests, the 2003 Vauxhall Signum has the highest MOT pass rate at 77%, while the 2004 model has the lowest at 67%, a 10 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Are newer Vauxhall Signums more reliable?
The Vauxhall Signum has maintained consistent MOT pass rates across model years, varying by only 1 percentage point.
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