2015 Mazda 6 2.2L Diesel · GF15 XBP

The vehicle most recently passed its MOT on 28 August 2026 with no defects recorded, which is the most recent and relevant outcome for any prospective buyer. However, this pass must be viewed in the immediate context of a failure on 12 August 2026, just sixteen days earlier, where the car was presented with two major defects relating to rear suspension arms being corroded and seriously weakened on both the nearside and offside. A major category defect of this nature indicates structural compromise beyond surface corrosion, and the fact that both rear arms were flagged simultaneously suggests systemic deterioration rather than an isolated issue. The same test raised an advisory concerning a front oil leak described as not excessive, which still warrants attention as oil leaks have a habit of escalating with continued use. Looking back over the full history, the maintenance trajectory is not a stable one. Between 2021 and 2022 the car was passing cleanly, but by 2021 there were already advisories for worn front suspension arm pins or bushes on both sides, and in that same year a prior failure recorded dangerous rear brake pads under 1.5 mm thick, a nearside front wheel bearing with excessive play, and a tyre with cuts exposing ply or cords. The pattern reveals a vehicle with progressive suspension and brake wear that has now culminated in structurally weakened rear suspension components. The recorded mileage of 122,586 miles over approximately eleven years equates to an annual average of around 11,144 miles, which is broadly typical for a car of this age and not indicative of either excessive motorway mileage or extended periods of standing. There are no significant gaps in the annual MOT testing pattern that would suggest long periods of inactivity, and the consistent year-on-year presentation implies regular use. Mechanically, this mileage profile means that in addition to the documented defects, normal wear items such as brake discs, calipers, drive belts, coolant and transmission components are likely approaching or have already required replacement. Higher mileage naturally accelerates consumable wear and increases the likelihood of advisories or failures appearing at shorter intervals, which is consistent with the cluster of defects recorded in the more recent tests. Given the seriousness of the recent rear suspension arm failures, a prospective buyer must prioritise a thorough physical inspection of the rear suspension assembly. The corrosion cited as seriously weakened suggests that the arms may have been replaced shortly after the August 2026 failure to secure the pass, so it is essential to verify whether new components have been fitted and to obtain documentary evidence of this work. Even with new arms, the surrounding areas, subframe mounting points, and brake lines should be inspected for similar corrosion, as corrosion rarely presents in isolation on a vehicle of this age and mileage. On a test drive, listen for any clonking or knocking noises from the rear suspension over bumps or during direction changes, and pay attention to any vagueness in rear handling or instability under braking. The advisory concerning front oil leak should be investigated by checking under the bonnet for residue around the engine block, valve cover, and oil filter housing, and by examining the underside for any active dripping. Beyond the documented history, age and mileage appropriate checks should be carried out. Although the mileage is not exceptionally high, an eleven year old vehicle is susceptible to time based degradation regardless of use. Inspect the tyre sidewalls closely for cracking or perishing, as rubber deteriorates with age even when tread depth remains adequate, and check the spare wheel and any unused tyres similarly. Examine the brake discs for signs of corrosion or binding calipers, particularly if the car has stood for any length of time, and confirm that the brake fluid has been changed in line with manufacturer schedules, typically every two to three years. The 12V battery should be load tested, as batteries beyond five years of age are prone to failure regardless of apparent condition. Finally, verify the service book stamps and request evidence of cambelt or timing chain replacement intervals, along with recent replacements of coolant, brake fluid, and automatic transmission fluid if applicable, to ensure that the vehicle has been maintained in line with its calendar age rather than just its mileage.