2018 Vauxhall Insignia 1.6L Diesel · FP18 LLK

The most recent DVSA examination on 19 May 2026 resulted in an initial Dangerous failure due to both front tyres presenting a tread depth below the statutory 1.6 mm limit, alongside an advisory noting that the front brake discs were worn, though not excessively. A straight retest on the same date produced a Pass once the tyres were replaced, with the brake disc advisory carried forward. Looking at the five-year trend, a clear pattern emerges of progressive braking and lighting component degradation. The vehicle first attracted attention for brake disc wear on the rear axle in January 2022, followed by persistent advisories for front brake disc wear across both 2025 and 2026, and a Prescribeable failure in 2025 for non-compatible headlamp light sources on both sides. While the car has not failed on structural integrity, emissions, or major mechanical assemblies, the repeat brake-related advisories and tyre failure suggest a maintenance trajectory that is mildly worsening and warrants close scrutiny of the braking system during a physical inspection. With 139,011 miles recorded on an eight-year-old vehicle, this Insignia is running at approximately 17,376 miles per year, which is substantially higher than the typical 10,000 to 12,000 mile average. This indicates a vehicle that has seen consistent, possibly motorway-fleet or long-commute use, which accelerates wear on consumables and drivetrain components. There are no significant gaps in the MOT history that would suggest prolonged standing, so calendar-based degradation from inactivity is less of a concern than mechanical fatigue. However, the cumulative mileage means that clutch, dual-mass flywheel if diesel, turbocharger, injector, and suspension component life should all be carefully assessed, as these parts are highly sensitive to high mileage accumulation. The fact that the annual MOT cadence is consistent reflects a vehicle in regular service rather than one left idle, which is generally favourable for mechanical longevity but demanding on consumables. Given the recurring front brake disc advisory and the Dangerous tyre tread failure, the braking system should be the primary focus of any pre-purchase inspection. The buyer should physically measure remaining disc material thickness against the manufacturer’s minimum specification, as worn discs that are within tolerance at MOT may still cause brake shudder, pulsing through the pedal, or extended stopping distances under heavy load. A test drive from a cold start should reveal any binding calipers, uneven pulling to one side, or embedded warning lights on the dashboard. The brake fluid should also be examined, as high-mileage vehicles frequently have neglected fluid despite the discs receiving attention, and moisture-contaminated fluid lowers the boiling point, leading to brake fade under sustained use. Additionally, the 2025 headlamp failure relating to non-compatible light sources indicates previous bulb replacement with aftermarket LED or HID units; the buyer should verify correct beam pattern and ensure no dashboard bulb failure indicators remain illuminated. Beyond the documented defects, a high-mileage Insignia of this age demands a comprehensive age-related inspection. The 12V battery should be load-tested, as eight years of service is approaching or beyond typical battery life and a failing battery can cause erratic electronic behaviour in Insignia models known for infotainment faults. Tyre sidewalls should be checked for perishing and cracking, as high-mileage tyres may be replaced for tread but sidewalls degrade with age and UV exposure. Check the cam belt or timing chain replacement history according to manufacturer intervals, inspect the coolant and transmission fluid for colour and clarity, and examine the rear suspension bushes and coil springs for sagging or cracking, which is common on this platform. Finally, verify a full service history with stamps matching the high annual mileage, and inspect the exhaust system for corrosion at the mounting points and flex pipe, particularly given the high accumulated mileage on a 2018 vehicle.