2009 Mazda 6 2.0L Diesel · MA59 XTM

A chronic pattern of structural corrosion and recurring brake-related defects dominates the mechanical history of this Mazda 6. Across all recorded tests since 2020, advisories concerning general underside corrosion, suspension component corrosion, and exhaust system corrosion have appeared repeatedly, with the 2024 test escalating this concern by flagging that all front and rear suspension components are very rusty and perished. The exhaust silencer was also noted as loose with a rotten system, and both a 2023 and 2022 test recorded general underside corrosion. The most recent test on 2024-10-11 produced a pass alongside the same date failure that included a dangerous defect for an offside front tyre tear caused by structural separation, a major defect for an insecurely attached offside rear anti-roll bar linkage, and a major defect for a non-functioning offside front position lamp. Earlier failures in 2023 included a dangerous weakened offside rear inner brake disc, excessively binding offside rear service brake, and a brake lever with insufficient reserve travel, while the 2020 failure included a dangerous offside front inner brake pad below 1.5 mm, significantly worn front brake discs, and fluctuating nearside front service brake. The recurring nature of both brake disc, pad, and binding caliper defects alongside progressive corrosion advisories indicates a vehicle where wear items and structural deterioration are advancing concurrently. The recorded mileage of 103,824 miles over approximately seventeen years equates to an annual accumulation of around 6,107 miles, which sits broadly in line with typical usage for a vehicle of this age. There are no extended gaps in the testing record that would indicate significant periods off the road, with annual tests consistently recorded from 2020 through 2024. This relatively continuous usage pattern means the corrosion issues cannot be attributed to long-term standing, but rather to genuine age-related degradation of ferrous components, whilst the brake-related failures reflect active wear from regular driving. The mileage itself is moderate, suggesting that the brake and suspension wear observed is a function of component age and exposure rather than unusually high mechanical loading, though the severity of the corrosion advisories suggests the underside has been exposed to harsh winter conditions or road salt over many years. A prospective buyer should treat the underside corrosion advisories as the primary area of concern and budget for potential rectification work. The 2024 advisory noting perished suspension components warrants a thorough inspection of all control arms, bushes, anti-roll bar linkages, and coil springs for cracking, splitting, or movement beyond manufacturer tolerances. The insecurely attached offside rear anti-roll bar linkage recorded as a major failure in 2024 should be verified as properly replaced, as anti-roll bar droplinks and bushes are wear items that can produce clonking noises over uneven surfaces and imprecise cornering behaviour when compromised. Listen for knocks or rattles from the front and rear suspension over speed humps and potholes, and check for uneven tyre wear that could indicate worn bushes allowing camber change. The exhaust system should be inspected with the vehicle raised if possible, as the recorded rotten condition suggests replacement may be imminent, and a loose or hanging silencer will produce an audible exhaust drone or rattle under load. The brake-related history is the second critical inspection area. The 2023 dangerous defect for a weakened offside rear inner brake disc and excessively binding rear brake, combined with the 2020 dangerous front brake pad defect and fluctuating nearside front brake, indicates that the caliper guide pins, sliding mechanisms, or handbrake mechanism may be at fault. On a test drive, the buyer should feel for any pulling to one side under braking, any judder through the pedal suggesting disc runout or thickness variation, and whether the handbrake holds effectively on an incline, as binding rear brakes often point to seized caliper sliders or a faulty handbrake mechanism. The headlamp condition advisories and the recorded offside front position lamp failure in 2024 should prompt a check of all exterior lighting, particularly the dipped beam operation, and the lens condition should be examined for condensation or heavy UV degradation. Finally, the advisory noting the engine oil light illuminated with no oil visible on the dipstick requires immediate verification on inspection, as this could indicate a low oil level, a faulty oil pressure sender, or an engine mechanical concern that warrants a compression test or oil pressure check before purchase.