At a Glance
The Vauxhall Signum has 5 identified common problems across 1 generation, with the Mk1 (2003-2008) being the most affected generation and suspension the most common problem category. Based on 174K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on a specific model than the UK average — confirmed at 99% statistical confidence. Read our DVSA MOT data methodology →
Below: generation-by-generation comparison of Vauxhall Signum common problems, MOT failure types, and pass-rate data drawn from DVSA records. Click any generation to see fuel- and engine-specific fault patterns, mileage-banded repair guidance, and the most common MOT failures testers record.
MOT Tests & Failures by Generation
Vauxhall Signum generations by MOT tests, failures, and identified problems from DVSA data
Hover over each bar for a full breakdown. Tap any bar to view that generation's problems.
Showing total MOT tests, failures, and known problems per make. Hover over each bar for a full breakdown.
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Tell Us About Your Problem
Help other Vauxhall Signum owners — report a problem and we'll add it to the database
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Most Common Vauxhall Signum MOT Failures
Every reason Vauxhall Signum vehicles fail their MOT, ranked by frequency. Select an individual year to see only that year’s failures, or stay on ‘All time’ for the combined picture across our 20 years of DVSA data. Scroll inside the table for the full list.
| # | Failure | % of failures |
|---|---|---|
| 1 | Suspension joint or bush worn | 11.64% |
| 2 | Tyre tread depth below limit | 8.35% |
| 3 | Number plate lamp not working | 8.03% |
| 4 | Coil spring broken or corroded | 7.64% |
| 5 | Brake hydraulic component worn | 6.26% |
| 6 | Tyre condition | 6.11% |
| 7 | Wiper blades deteriorated | 5.07% |
| 8 | Driveshaft fault | 3.76% |
| 9 | Exhaust system fault | 3.52% |
| 10 | Brake pads or linings worn | 3.37% |
| 11 | Shock absorber worn or leaking | 3.21% |
| 12 | Brake performance below minimum | 3.20% |
| 13 | Headlamp aim defect | 2.66% |
| 14 | Windscreen washer not working | 2.62% |
| 15 | Stop lamp not working | 2.59% |
| 16 | Catalytic converter efficiency low | 1.91% |
| 17 | Front lamp not working | 1.86% |
| 18 | Brake disc or drum worn | 1.50% |
| 19 | Rigid brake pipe corroded or damaged | 1.31% |
| 20 | Rear lamp not working | 1.24% |
| 21 | Headlamp fault | 0.93% |
| 22 | Track rod end worn | 0.89% |
| 23 | Indicator fault | 0.80% |
| 24 | Position lamp not working | 0.76% |
| 25 | Ball joint dust cover split | 0.70% |
| 26 | Spark ignition emissions above threshold | 0.67% |
| 27 | Parking brake performance below minimum | 0.65% |
| 28 | Windscreen damage affecting view | 0.61% |
| 29 | ABS fault | 0.51% |
| 30 | Seat belt condition | 0.40% |
| 31 | Mirror damaged or missing | 0.40% |
| 32 | Steering rack fault | 0.38% |
| 33 | Airbag warning light on | 0.37% |
| 34 | Parking brake condition | 0.36% |
| 35 | Fog lamp not working | 0.34% |
| 36 | Brake fluid leak | 0.29% |
| 37 | Front suspension joint worn | 0.28% |
| 38 | Steering free play excessive | 0.28% |
| 39 | Compression ignition emissions above threshold | 0.28% |
| 40 | Tyre size or type not matched | 0.27% |
| 41 | Steering arm worn | 0.25% |
| 42 | Flexible brake hose damaged | 0.23% |
| 43 | Battery loose or leaking | 0.21% |
| 44 | Brake caliper fault | 0.19% |
| 45 | Fuel cap damaged or missing | 0.18% |
| 46 | Front suspension fault | 0.18% |
| 47 | Drag link end worn | 0.17% |
| 48 | Suspension linkage fault | 0.16% |
| 49 | MacPherson strut worn | 0.13% |
| 50 | Brake pedal movement restricted | 0.12% |
| 51 | Electronic stability control fault | 0.12% |
| 52 | Brake pedal fault | 0.12% |
| 53 | Body corrosion or damage | 0.11% |
| 54 | Rear fog lamp not working | 0.11% |
| 55 | Subframe corrosion or damage | 0.09% |
| 56 | Electrical wiring fault | 0.09% |
| 57 | Horn not working | 0.07% |
| 58 | Wheel bearing worn | 0.07% |
| 59 | Rear suspension fault | 0.07% |
| 60 | Steering column fault | 0.06% |
| 61 | Electric power steering fault | 0.06% |
| 62 | Steering operation fault | 0.06% |
| 63 | Bonnet catch or hinge fault | 0.05% |
| 64 | Brake fluid level low or contaminated | 0.04% |
| 65 | Electrical switch fault | 0.04% |
| 66 | Fuel pipe corroded or damaged | 0.04% |
| 67 | Suspension unit fault | 0.04% |
| 68 | Brake lever fault | 0.04% |
| 69 | Engine oil leak | 0.04% |
| 70 | Dashboard warning lamp fault | 0.04% |
| 71 | Suspension mounting corroded | 0.04% |
| 72 | Handbrake lever fault | 0.03% |
| 73 | Speedometer fault | 0.03% |
| 74 | Anti-roll bar worn or corroded | 0.03% |
| 75 | Power steering ram fault | 0.03% |
| 76 | Propshaft fault | 0.03% |
| 77 | Brake fluid warning light on | 0.03% |
| 78 | Tyre valve stem damaged | 0.03% |
| 79 | Headlamp levelling device fault | 0.02% |
| 80 | Rear reflector damaged or missing | 0.02% |
| 81 | Driver seat fault | 0.02% |
| 82 | Driver airbag fault | 0.02% |
| 83 | Handbrake cable fault | 0.02% |
| 84 | Suspension arm worn or corroded | 0.02% |
| 85 | Bumper damaged or insecure | 0.02% |
| 86 | Body security fault | 0.02% |
| 87 | Rear fog lamp warning light fault | 0.02% |
| 88 | Boot lid damaged or insecure | 0.02% |
| 89 | Indicator warning light fault | 0.02% |
| 90 | Steering lock fault | 0.02% |
| 91 | Front passenger door fault | 0.02% |
| 92 | Tailgate damaged or insecure | 0.02% |
| 93 | Power steering pipe or hose leaking | 0.02% |
| 94 | Towbar fault | 0.01% |
| 95 | King pin or swivel pin worn | 0.01% |
| 96 | Main beam warning light fault | 0.01% |
| 97 | Steering shaft fault | 0.01% |
| 98 | Tie bar or rod worn or corroded | 0.01% |
| 99 | Brake cable, rod, lever or linkage fault | 0.01% |
| 100 | Engine mounting worn or broken | 0.01% |
| 101 | Fuel hose damaged or leaking | 0.01% |
| 102 | Chassis condition | 0.01% |
| 103 | Brake air or vacuum system fault | <0.01% |
| 104 | Undertray damaged or missing | <0.01% |
| 105 | Bonded suspension condition | <0.01% |
| 106 | Steering wheel damaged or insecure | <0.01% |
| 107 | Steering coupling worn | <0.01% |
| 108 | Exhaust leak | <0.01% |
| 109 | Stub axle worn | <0.01% |
| 110 | Fuel tank corroded or leaking | <0.01% |
| 111 | Additional braking device fault | <0.01% |
| 112 | Driver door fault | <0.01% |
| 113 | Hydraulic brake cylinder fault | <0.01% |
| 114 | Brake fluid reservoir fault | <0.01% |
| 115 | Hydraulic fluid leak | <0.01% |
| 116 | Universal joint worn | <0.01% |
| 117 | Hazard warning light fault | <0.01% |
| 118 | Window damaged or won't operate | <0.01% |
| 119 | Power steering pump fault | <0.01% |
| 120 | Subframe mounting corroded | <0.01% |
| 121 | Transmission oil leak | <0.01% |
| 122 | Passenger airbag fault | <0.01% |
| 123 | Suspension retaining or locking device fault | <0.01% |
| 124 | Vehicle structure corrosion | <0.01% |
| 125 | Front fog lamp not working | <0.01% |
| 126 | Mirror or camera fault | <0.01% |
| 127 | Passenger seat fault | <0.01% |
| 128 | Seat belt pre-tensioner fault | <0.01% |
| 129 | Steering box fault | <0.01% |
| 130 | Access panel damaged or insecure | <0.01% |
| 131 | Brake back plate corroded or damaged | <0.01% |
| 132 | Full power hydraulic brake fault | <0.01% |
| 133 | Loading door damaged or insecure | <0.01% |
| 134 | Steering drive system fault | <0.01% |
| 135 | Suspension linkage attachment bracket or mounting corroded | <0.01% |
| 136 | Suspension rod worn or corroded | <0.01% |
| 137 | Brake master cylinder fault | <0.01% |
| 138 | Exhaust emissions above threshold (non-catalyst) | <0.01% |
| 139 | Headlamp washer not working | <0.01% |
| 140 | Leaf spring broken or corroded | <0.01% |
| 141 | Passenger compartment corrosion | <0.01% |
| 142 | Radius arm worn or corroded | <0.01% |
| 143 | Spare wheel fault | <0.01% |
| 144 | Tyre pressure monitoring system fault | <0.01% |
| 145 | Brake pressure or vacuum buildup insufficient | <0.01% |
| 146 | Brake relay lever fault | <0.01% |
| 147 | Brake servo fault | <0.01% |
| 148 | Brake stationary pin worn | <0.01% |
| 149 | Brake valve fault | <0.01% |
| 150 | Brake wheel cylinder fault | <0.01% |
| 151 | Dip switch fault | <0.01% |
| 152 | Electronic braking system fault | <0.01% |
| 153 | Exhaust heat shield or sound insulation damaged | <0.01% |
| 154 | Hand-operated brake valve condition | <0.01% |
| 155 | Outline marker lamp not working | <0.01% |
| 156 | Seat belt anchorage fault | <0.01% |
| 157 | Seat belt or padding damaged | <0.01% |
| 158 | Securing bolts missing or insecure | <0.01% |
| 159 | Steering damper fault | <0.01% |
| 160 | Steering intermediate drop arm worn | <0.01% |
| 161 | Wheel hub fault | <0.01% |
Showing all 161 reasons — scroll inside the table for the full list.
Vauxhall Signum MOT Failures by Category
Total MOT failure occurrences for the Vauxhall Signum, grouped by category. Same data as the failures table above — just sliced by category instead of fault title. Hover a slice for the top failures in each category.
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Frequently Asked Questions
What are the most common Vauxhall Signum problems?
Based on analysis of 174K Vauxhall Signum MOT tests from DVSA data, we have 5 identified common problems across 1 generation. The most frequently flagged issue is "Coil spring broken or corroded". Suspension is the most common problem category.
Which Vauxhall Signum generation has the most problems?
The Vauxhall Signum Mk1 (2003-2008) (2003–2008) has the highest number of identified common problems (6). Click the generation card above for the full breakdown.
How is this data calculated?
We analyse anonymised DVSA MOT test records under the Open Government Licence. An issue is classified as a "Common Problem" when it occurs significantly more often on a specific model than the UK average, confirmed at 99% statistical confidence. Read the full methodology page for details.
Can I report a problem with my Vauxhall Signum?
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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