2009 Vauxhall Insignia 1.8L Petrol · DY09 DTF

The vehicle remains roadworthy but the maintenance history indicates a worsening trend regarding structural integrity and fluid seals. The most recent test in January 2026 at 138,525 miles identified significant corrosion on the rear sub-frame and active leaks from both oil and coolant. While the car passed, the presence of structural corrosion alongside multiple fluid leaks suggests that the vehicle is entering a phase where age-related component failure will require more frequent investment beyond simple consumable replacements. At 138,525 miles over 17 years, the Insignia has averaged approximately 8,150 miles per year, reflecting a consistent usage pattern for a 2009 model. The mileage progression shows steady annual accumulation with roughly 5,000 to 7,000 miles covered between annual tests. This regular use suggests the car has not sat stationary for long periods, but the cumulative mileage places high stress on the aging rubber components and suspension geometry, which aligns with the recurring mechanical failures seen in the record. A prospective buyer must conduct a thorough physical inspection of the rear sub-frame to determine if the corrosion noted in 2026 has progressed toward a structural failure point. The history shows recurring issues with the suspension and steering, including a worn anti-roll bar linkage in 2025 and free play in the steering rack noted as early as 2024. Particular attention should be paid to the oil and coolant leaks identified in the latest test, as these often indicate gasket failures or hose degradation that become costly to rectify on older Vauxhall engines.