About the Vauxhall Signum
Produced from 2003 to 2008, the Vauxhall Signum shared its platform with the Vectra but offered a unique raised roofline and flexible rear seating configuration. The model was marketed as a premium family car, featuring a distinctive fastback design with individual rear seats that could slide and recline independently. Engine options included 1.8, 1.9, 2.0, 2.2 and 3.0-litre units in petrol and diesel formats, with the 1.9 CDTi proving particularly popular for its fuel economy and refinement.
Standard equipment varied by trim level, with higher-spec Elite and Design models offering leather upholstery, sat-nav, parking sensors and climate control. Despite modest sales figures, the Signum developed a loyal following among drivers seeking something different from conventional executive saloons. Build quality improved throughout the production run, with later models benefiting from enhanced materials and reliability.
What Affects the Price
Age remains the primary factor, with pre-2006 models commanding £4,000-£7,000, whilst late 2007-2008 examples can reach £10,000-£22,000 in exceptional condition. Mileage significantly impacts value, with sub-60,000-mile cars achieving premium prices compared to higher-mileage examples which may sell for 30-40% less.
Diesel models, particularly the 1.9 CDTi, typically hold their value better than petrol equivalents due to running costs and torque delivery. Full service history is essential, as neglected maintenance can lead to expensive repairs on complex systems like the dual-mass flywheel and turbochargers. Desirable specifications include Elite trim, leather interior, satellite navigation and xenon headlights. Condition of the electrical systems and evidence of recalls being addressed also affect pricing considerably.
Buying Tips
Check for complete service history, particularly cambelt changes on diesel engines which should be completed every 100,000 miles or 10 years. Inspect the rear seat mechanisms thoroughly as the sliding rails can wear or jam, whilst the electric seat adjustments should operate smoothly without hesitation.
Test all electrical features including climate control, parking sensors and satellite navigation as faults can be expensive to rectify. Look for signs of oil leaks around the engine and listen for turbo whistle or excessive diesel rattle on cold starts. Examine the dual-mass flywheel for judder or vibration during clutch operation, as replacement costs £800-£1,200. Verify the VIN against DVLA records and check for outstanding recalls, particularly regarding power steering and airbag systems. Factor in running costs, as parts and servicing align with contemporary Vectra models, keeping maintenance affordable compared to premium German rivals.