2015 Vauxhall Insignia 2.0L Diesel · WM15 JYA

A ten-year-old Vauxhall Insignia carrying 65,390 miles presents a roadworthiness history that is largely uneventful but interrupted by one significant diesel-specific failure that warrants close attention. The most recent test on 27 August 2026 resulted in a pass, with only a minor advisory noting a nail in the offside front tyre. Looking at the broader trajectory, the vehicle has recorded five tests over the recorded history, passing cleanly on four occasions and failing only once. That single failure, dated 28 August 2025, flagged a major defect for a fluid leak from the fuel filter deemed harmful to the environment or a risk to other road users. The vehicle was re-presented on the same day and passed with no advisories recorded, suggesting the leak was repaired between the two tests. The intervening period between September 2024 and August 2025 contained no other recorded defects, and the 2023 test passed with a single advisory for front brake pads wearing thin. The mechanical story is therefore one of generally consistent roadworthiness, punctuated by a specific emissions-related fluid leak that has since been addressed. The recorded mileage of 65,390 miles over approximately eleven years equates to an annual accumulation of around 5,945 miles, which sits well below the typical usage profile for a vehicle of this age and type. There are no unusual jumps or sudden escalations in the recorded mileages across the visible test history, and no significant gaps that would imply prolonged periods off the road between tests. The relatively gentle rate of accumulation tends to result in slower wear on major drivetrain components, clutches, and engine internals, though it can also mean that some consumables such as brake discs, tyres, and suspension linkages may have aged through environmental exposure rather than through mechanical use. Diesel fuel system components in particular can be susceptible to issues arising from infrequent running, where condensation or extended fuel stagnation can accelerate seal degradation. The fuel filter fluid leak recorded as a major defect in August 2025 is the most significant item in this vehicle's history and should be the focus of any pre-purchase evaluation. The defect reference 8.4.1 (a) (i) indicates a leak sufficient to cause dripping onto the road or other components, and on a diesel Insignia this typically points to the fuel filter housing, associated seals, or the return line connections. A prospective buyer should inspect the area beneath the fuel filter housing, commonly located on the engine bay bulkhead or near the engine block depending on variant, for any signs of wetness, staining, or crystallised diesel residue. On a test drive, particular attention should be paid to any diesel smell under the bonnet after the engine has been running, visible drips when the vehicle is stationary, and any rough running or fuel cut-off symptoms that might suggest air ingress through a compromised seal. It is also worth confirming with the seller what remedial work was carried out between the failure and the subsequent pass on the same day, and whether a replacement fuel filter housing or seal kit was fitted rather than a temporary repair. The 2023 advisory for front brake pads wearing thin suggests that pad replacement has been due for some time and may now have been completed. On inspection, the buyer should check the current pad material thickness through the wheel spokes and examine the brake discs for a defined outer lip, which would indicate wear approaching or exceeding service limits. The advisory does not specify nearside or offside, so both front corners should be examined. The recent tyre nail advisory is a minor issue but should prompt a thorough check of all four tyres and the spare for embedded debris, sidewall damage, and overall tread depth, particularly given the low annual mileage which can mean tyres have aged considerably even if tread remains adequate. Finally, given the low usage profile, the vehicle should be evaluated for signs of corrosion around the suspension arms, subframe, and brake line brackets, areas where road salts accumulate over winter months regardless of how little the odometer advances. A test drive over uneven surfaces should be carried out to listen for any knocking from the front suspension, which is a known weakness area on Insignias of this generation.