2003 Vauxhall Signum Design Dti Auto MOT Pass Rate
Pass rate for Signum Design Dti Auto models manufactured in 2003, based on 51 real MOT test results.
Data from official DVSA MOT testing records
2003 Vauxhall Signum Design Dti Auto MOT Analysis
The 2003 Vauxhall Signum Design Dti Auto has an MOT pass rate of 43.1% based on 51 tests — significantly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 103,046 miles on the odometer. With a 56.9% failure rate, the 2003 Signum Design Dti Auto is rated as "Very Poor" for MOT reliability.
The leading cause of MOT failure for the 2003 Vauxhall Signum Design Dti Auto is Lamps, Reflectors and Electrical Equipment, responsible for 3.9% of failures. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs range from £5–50. Tyres is the second most common issue at 3.9%. Exhaust, Fuel and Emissions follows at 3.9%.
Top failures specific to 2003 models only. The overall Signum Design Dti Auto page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Lamps, Reflectors And Electrical Equipment | 3.9% | 2 |
| 2 | Tyres | 3.9% | 2 |
| 3 | Exhaust, Fuel And Emissions | 3.9% | 2 |
| 4 | Suspension | 2.0% | 1 |
Failures per 10,000 Miles
avg. 103,046 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Lamps & Electrical | 0.38 | 3.9% | 2 |
| Tyres | 0.38 | 3.9% | 2 |
| Emissions & Exhaust | 0.38 | 3.9% | 2 |
| Suspension | 0.19 | 2.0% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2003 Vauxhall Signum Design Dti Auto has an MOT pass rate of 43.1% based on 51 tests — significantly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 103,046 miles on the odometer. With a 56.9% failure rate, the 2003 Signum Design Dti Auto is rated as "Very Poor" for MOT reliability.
If you own or are considering buying a 2003 Vauxhall Signum Design Dti Auto, be prepared for above-average maintenance costs. Before your MOT, pay particular attention to lamps, reflectors and electrical equipment: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test. With an average mileage of 103,046 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Lamps, Reflectors and Electrical Equipment — 3.9% of failures
Lamps, Reflectors and Electrical Equipment issues account for 3.9% of MOT failures on 2003 Vauxhall Signum Design Dti Auto models. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Tyres — 3.9% of failures
Tyres issues account for 3.9% of MOT failures on 2003 Vauxhall Signum Design Dti Auto models. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Exhaust, Fuel and Emissions — 3.9% of failures
Exhaust, Fuel and Emissions issues account for 3.9% of MOT failures on 2003 Vauxhall Signum Design Dti Auto models. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.