At a Glance
The Vauxhall Signum Mk1 has 5 identified problems that occur more often than the UK average, with Coil spring broken or corroded being the most reported. Suspension is the most common MOT failure category. The most serious issue flagged is Rigid brake pipe corroded or damaged, rated as dangerous. Based on 174K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on this model than the UK average — confirmed at 99% statistical confidence. Read how we calculate MOT pass rates and problems →
Below: the full MOT-data picture for the Vauxhall Signum Mk1 — MOT pass rate vs the UK average, common problems vs UK fleet patterns, the most likely MOT failures by frequency, fault occurrence by mileage band, and pass/fail trends. All numbers drawn from DVSA records.
Vauxhall Signum Mk1 MOT Pass Rate
Across 174K MOT tests from DVSA data, the Vauxhall Signum Mk1 (2003–2008) has a fail rate of 42.9%.
UK average fail rate (2006–2008): 37.6%
Common Vauxhall Signum Mk1 Problems
Owner-submitted reports plus patterns we've identified across 559 million UK MOT tests. Each MOT-derived item below — whether tagged as a Problem, Wear & Tear or Consumable — shows up noticeably more often on this generation than across the UK fleet, which is why it's here. Owner reports are pinned to the top by default; use the sort and filter pills below to view a specific tier or change the order.
Coil spring broken or corroded
13,210
occurrences
Exhaust system fault
4,707
occurrences
Compression ignition emissions above threshold
331
occurrences
Steering arm worn
311
occurrences
Rigid brake pipe corroded or damaged
121
occurrences
Tell Us About Your Problem
Help other Vauxhall Signum Mk1 owners — report a problem and we'll add it to the database
Tell Us About Your Problem
Help other Vauxhall Signum Mk1 owners — report a problem and we'll add it to the database
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Problems by mileage
Common problems, MOT failures and advisories on the Vauxhall Signum Mk1, grouped by the mileage they typically appear at.
600 distinct problems · 345,068 total occurrences in current filter
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Advisory items are MOT tester observations. Frequency can be influenced by driving style and usage patterns.
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Frequently Asked Questions
What are the most common Vauxhall Signum Mk1 problems?
Based on DVSA MOT data for the Vauxhall Signum Mk1 (2003–2008), we have identified 5 common problems. The most frequently reported is "Coil spring broken or corroded". Suspension is the most common MOT failure category.
How reliable is the Vauxhall Signum Mk1?
This generation has 174K MOT tests on record with a 42.9% fail rate. A fault is flagged as a "Common Problem" only when it occurs significantly more often on this model than the UK average, confirmed at 99% statistical confidence.
What commonly fails the MOT on a Vauxhall Signum Mk1?
There are 172 distinct MOT failure types recorded for the Mk1 (2003–2008), grouped by the mileage these failures typically occur. See the Common MOT Failures section on this page.
Can I report a problem with my Vauxhall Signum Mk1?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Vauxhall Signum owners spot problems early. All submissions are reviewed before being added to the public database.
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