2015 Mazda 6 2.2L Diesel · ST15 EHC

The vehicle is currently roadworthy but the maintenance trend shows a recent shift from clean inspections to reactive repairs. While it passed its most recent test in September 2025 at 122,174 miles, this followed a significant failure just six months prior. The failure in March 2025 revealed a multitude of mechanical and structural warning signs across the suspension, braking, and bodywork, indicating that the vehicle has reached a stage where deferred maintenance or component fatigue is being addressed only after triggering a test failure. The mileage pattern remains consistent with typical usage for a vehicle of this age, averaging approximately 11,000 miles per year. There is a steady accumulation between 2022 and 2024, where the car covered over 25,000 miles without recorded defects. However, the jump of 10,000 miles between February 2024 and March 2025 suggests a period of high-intensity use or longer distance commuting, which likely correlates with the accelerated wear seen on rubber components and metal-related parts noted in the later inspections. A buyer must pay close attention to the structural integrity of the rear sub-frame and lower suspension arms, which were flagged for corrosion in the March 2025 test. Although the tester deemed these not seriously weakened, the presence of rust on multiple load-bearing points requires monitoring for further structural perforation. The fractured offside rear coil spring and worn suspension arm bushes indicate that the suspension geometry is under significant stress, and a physical inspection should confirm that the repairs made after the March failure were truly comprehensive. The braking system also requires close scrutiny. The September 2025 test identified thin front brake pads and pitted, scored discs, suggesting the components are nearing the end of their functional life. Combined with the corrosion noted on the rear brake hoses during the previous March test, there is a risk of hydraulic inefficiency or seizing calipers. Furthermore, the perishing of the front tyres noted in the latest test indicates that the rubber compound is degrading due to age rather than just mileage, necessitating immediate replacement to ensure adequate grip.