2015 Vauxhall Insignia 2.0L Diesel · DL15 AAE

A fractured pair of rear coil springs flagged as major defects in May 2025 dominates the mechanical narrative of this Vauxhall Insignia and points to a rear suspension that has clearly absorbed the full brunt of high-mileage wear. The failure on the 2025-05-09 test saw both nearside and offside rear springs condemned simultaneously, and although the vehicle returned to a pass on 2025-05-15, the re-test only recorded advisories for loose rear shock absorber shrouds, which carry over from the same component area. The most recent test on 2026-05-12 returned a pass, yet it carried five advisories, two of which concerned worn lower suspension arm pins or bushes at both front corners, alongside three tyre wear advisories spanning nearside front, offside front and nearside rear edges. The pattern shows that after the spring rectification, the front suspension has now begun to register movement in its linkages, suggesting progressive wear spreading to the front axle rather than a resolved mechanical state. Mileage of 149,643 miles across roughly eleven years equates to an annual accumulation of around 13,600 miles, which is high for the age and places above-average demand on consumable components such as tyres, brake friction material and suspension bushes. The MOT record contains five tests covering 2023 to 2026, with intervals of approximately twelve months between each, indicating the vehicle has been in continuous active service throughout the recorded period with no multi-year lay-ups that would skew the interpretation. There are no rapid spikes or implausible gaps in the mileage pattern that would raise concern about clocked readings, and the mileage progression aligns with a car that has been used consistently as regular transport. Mechanically, this sustained high usage is consistent with the observed wear: rear coil springs failing together, front lower arm bushes registering play, and tyres repeatedly flagged at the legal edge within twelve-month intervals, all of which are typical outcomes of a vehicle that has covered substantially more than the average for its cohort. For a prospective buyer, the immediate priority is a thorough inspection of the rear suspension following the 2025 spring replacement, as the advisories for loose shock absorber shrouds suggest the shock units themselves may now be worn or that the new springs were not installed with fresh top mounts. On a test drive, listen for clonking noises from the rear over uneven surfaces, particularly single bumps, and pay close attention to any sagging at the rear when the boot is loaded, as coil springs on high-mileage Insignias are known to settle prematurely. At the front, the advisories for worn lower arm pins or bushes warrant a check for knocking or rattle over rougher roads and uneven tyre wear, especially on inner edges, which would indicate the bushes have worn beyond acceptable movement since the May 2026 test. The repeated tyre wear advisories on both front edges and the nearside rear edge over consecutive tests strongly suggest a geometry issue that has not been resolved, possibly stemming from the worn front suspension components now being flagged. On inspection, measure all four tyres for remaining tread depth and look for feathering or inner-edge wear patterns, which would indicate tracking misalignment or worn control arm geometry rather than simple ageing of the rubber. Finally, given the high mileage, the brake discs and pads should be physically inspected for lipping on the disc edges and remaining friction material, while the rear brake flexipes and caliper slide pins warrant close examination for corrosion and binding, as these are common failure points on Insignias operating at this duty cycle. The rear registration plate lamp failure recorded in 2025 should also be confirmed as rectified, as lamp failures of this nature are typically trivial but worth verifying before purchase.