2012 Mazda 3 1.6L Petrol · ND12 OPA

The vehicle most recently passed its MOT on 25 August 2026, but the overall maintenance trend is concerningly regressive. While the car has consistently achieved a pass, the nature of the advisories has shifted from routine wear-and-tear items in earlier years to systemic structural issues. The emergence of corrosion on the rear sub-frame and the integral body structure under the sills indicates a progressive deterioration of the chassis that has accelerated over the last three years. The recorded mileage of 75,602 miles over 14 years is notably low, averaging approximately 5,400 miles per year. While this suggests limited mechanical wear on the engine and drivetrain, such low usage often correlates with the corrosion issues seen in the history. Vehicles that spend long periods stationary or are used for short trips frequently suffer from moisture retention in chassis cavities and a lack of heat cycles to evaporate condensation, which likely contributed to the current state of the underbody and suspension components. Prospective buyers must prioritise a thorough inspection of the chassis. The recurring advisories regarding the rear sub-frame, trailing arms, and sills require a physical check to ensure the corrosion is superficial and not compromising the structural integrity of the vehicle. During a test drive, listen for knocks or clunks from the rear end, which may indicate failing suspension bushes or the previously noted play in the anti-roll bar linkage. Additionally, the persistent exhaust leaks at the flexi-pipe and middle section suggest the system is rusting through; listen for an abnormal drone or blowing sound under acceleration, as this will likely require a full or partial exhaust replacement soon. Given the low annual mileage, several age-related checks are essential regardless of the odometer reading. Inspect the tyre sidewalls for perishing or fine cracking, as rubber degrades over time even if the tread remains deep. Check the brake discs for heavy surface corrosion or evidence of binding calipers, which are common symptoms of a vehicle that has stood for extended periods. Finally, verify the service records to ensure that engine oil and other critical fluids have been changed according to calendar intervals rather than mileage, as time-based degradation can lead to internal sludge and premature component failure.