2010 Vauxhall Insignia 2.0L Diesel · JG07 RJG

A rear braking weakness is the defining mechanical characteristic of this Vauxhall Insignia, culminating in a dangerous failure at the December 2023 test where the nearside rear brake pad was found to be less than 1.5 mm thick, accompanied by an advisory for a worn, pitted and scored nearside rear brake disc. The vehicle did pass the same test on the same day once rectified, but the recorded defect represents the most acute safety concern in the MOT history and signals that pad and disc wear on the rear axle has been allowed to progress to a dangerous state. The recurring nearside rear direction indicator discolouration across the 2021, 2022 and 2023 tests, together with a 2021 headlamp aim failure on both sides and oil-related advisories in 2022, paint a picture of a car whose ancillary and lighting items have been drifting, even if the most recent overall outcome is a pass. With 121,192 miles recorded against a 2010 registration year and a roughly typical annual accumulation of around 7,574 miles, the Insignia sits squarely in a well-used but not exceptional mileage bracket for its age. There are no extended gaps between tests of more than a year that would suggest long periods off the road, and the consistency of annual MOT entries from 2021 through 2023 indicates continuous use. At this mileage a diesel or petrol Insignia of this generation will commonly show wear across suspension components, clutch or torque converter behaviour, and cooling system ancillaries, so the recorded mileage should be interpreted as broadly representative of a working family saloon that has covered steady mixed mileage rather than one that has been preserved or heavily exploited. A prospective buyer should prioritise a thorough inspection of the rear braking system given the documented history. The nearside rear disc should be physically measured for remaining thickness and checked for lipping, hot spots or run-out, while the corresponding caliper should be examined for seized slide pins that can cause uneven pad wear of the type flagged in the 2023 failure. On a test drive, listen for any rear binding when releasing the handbrake or pulling away, and feel for pulling to one side under firm braking that would indicate a sticking caliper. The rear shock absorbers, noted as lightly misting with oil in 2022, should be checked for any progression to a heavier weep or for damping fade by bouncing each rear corner and observing how quickly the body settles. The general oil leak advisory recorded alongside the shock misting in 2022 warrants tracing from beneath the engine bay, paying particular attention to the cam cover gasket, sump area and turbo or oil filter housing if this is a diesel derivative, as oil contamination can accelerate ageing of rubber bushes and drive belts. Headlamp alignment on both sides, which failed the 2021 test, should be confirmed against a flat surface, and the nearside rear indicator lens should be checked for fading or water ingress that would explain the persistent discolouration advisories. Finally, given the mileage, a raised inspection platform is strongly recommended to assess front suspension arms, anti-roll bar drop links, and subframe mounting points for corrosion or play, as Insignias of this vintage are known to develop clonks over uneven surfaces when these joints wear.