2015 Vauxhall Insignia 1.6L Diesel · SC65 CPV

The latest MOT test for this Vauxhall Insignia, conducted on 2026-01-19, resulted in a pass, though it highlighted two significant advisories that warrant careful consideration. The overall maintenance trend over the past three years shows a pattern of recurring issues rather than a consistent improvement or stability. The vehicle failed its MOT in 2023 due to major defects, including fractured rear coil springs, which were subsequently repaired, as evidenced by the subsequent passes. The rear spring advisories from 2024 and 2025—where springs were fitted in the wrong orientation—suggest ongoing suspension component fatigue, potentially linked to the prior failure. Additionally, persistent thin brake pad wear and rear tyre damage indicate ongoing friction system and tyre degradation, which could escalate if not addressed promptly. The vehicle’s recorded mileage of 89,324 miles at the time of assessment represents a moderate annual usage rate of approximately 8,120 miles per year, which is within the expected range for a 11-year-old car. However, the gap between the 2023 failure and the 2026 MOT—nearly three years—could imply periods of prolonged inactivity, potentially contributing to issues like standing corrosion or fluid degradation. While lower mileage might suggest less wear on consumables, the combination of high mileage and structural stress from suspension failures suggests that the drivetrain and suspension components have endured significant mechanical stress over time. This could lead to accelerated wear in related systems, such as the drivetrain bearings, bushings, or even the subframe mounts, which were also noted to be corroded. For a prospective buyer, the most critical areas to inspect are the rear suspension and braking systems. The history of fractured coil springs and the current advisories on their orientation suggest that the rear suspension is at a critical stage of wear. On a test drive, listen for excessive clunking or rattling from the rear axle area, particularly when driving over bumps or at speed, as this may indicate loose suspension components or worn bushes. Inspect the rear suspension for uneven ride height, binding calipers, or excessive play in the wheel bearings. The thin brake pads and potential tyre damage also warrant immediate attention; listen for a grinding noise when braking, which could signal metal-on-metal contact if pads are severely worn. Check for uneven tyre wear patterns, which may indicate misalignment or suspension issues, and visually inspect the tyres for cracks or perishing, especially given the age of the vehicle. Beyond the suspension and brakes, the vehicle’s standing corrosion and fluid degradation should be thoroughly assessed. Given the subframe corrosion advisory, examine the undercarriage for signs of rust progression, particularly around wheel arches, exhaust brackets, and the chassis rails. The 12V battery, which is typically replaced every 4-5 years, should be tested for voltage output and overall health, as prolonged inactivity can lead to weak or dead batteries. Finally, check the service history for fluid servicing records, particularly for the brake fluid, transmission fluid, and coolant, as these fluids degrade over time regardless of mileage. Since the vehicle has been driven at a moderate rate, calendar-based servicing—such as replacing the brake fluid every 2-3 years—is highly recommended to prevent corrosion in the braking system and ensure optimal engine and transmission performance. Additionally, verify that the exhaust emissions system has been serviced, as the 2023 failure may have indicated underlying issues that could recur if not properly maintained.