2015 Mazda 6 2.0L Petrol · SC15 TLN

The most recent MOT test for this 2015 Mazda 6 was conducted on 2026-06-16 and resulted in a clean pass, marking the vehicle’s fifth consecutive MOT test without recorded defects. However, the prior test on 2025-06-16 revealed a major failure for a fractured or broken nearside rear coil spring, which significantly impacts ride quality and structural integrity. While the intervening MOTs since then have been passed without further mechanical issues, the history indicates a critical failure at 11 years old and 116,000 miles, suggesting that the suspension system may have experienced accelerated wear or a design-related weakness in this particular component. This pattern warrants cautious optimism but underscores the need for heightened scrutiny during inspection, particularly around suspension geometry and alignment, as coil springs are prone to progressive failure from fatigue or improper mounting. The recorded mileage of 116,000 miles for a vehicle of this age represents a moderate annual usage rate of approximately 10,545 miles per year, which is typical for a car of its class. Such mileage does not inherently indicate excessive wear if the vehicle has been maintained appropriately, but it does imply that consumables like brake pads, filters, and fluids have likely undergone more frequent replacement. The absence of significant mileage gaps suggests consistent use, which could have contributed to the coil spring failure observed in the 2025 MOT, as repeated loading cycles may accelerate fatigue in suspension components. However, the lack of higher mileage accumulation—such as 15,000+ miles per year—reduces the likelihood of severe drivetrain or engine wear, though further inspection of the drivetrain and exhaust system would still be prudent. Given the recent MOT history and the critical nearside rear coil spring failure, the buyer should prioritise a thorough mechanical inspection before purchase. Focus on the suspension system by checking for uneven tyre wear patterns, particularly on the nearside rear, which may indicate misalignment or binding caused by the coil spring failure. Listen for clunking noises from the rear during cornering or over bumps, as this could signal loose suspension components or worn bushes. Additionally, verify that the nearside rear wheel alignment is correct, as an offset alignment may exacerbate tyre wear and further stress the suspension. Impending maintenance should include replacing the failed coil spring and inspecting the remaining suspension components, such as the rear suspension bushes and strut mounts, for signs of wear or corrosion. Beyond the suspension, the advisory from the 2021 MOT—tyres worn close to the legal limit on the nearside rear—should be addressed promptly. Given the age of the vehicle, consider replacing the nearside rear tyres with new or reconditioned ones to prevent uneven wear from the coil spring issue and ensure legal compliance. For the rest of the vehicle, check the tyre sidewalls for signs of perishing or cracking, which is more likely to occur with age than mileage, particularly if the car has been stored in a warm environment. Inspect the 12-volt battery for signs of corrosion or poor connections, as standing vehicles can suffer from battery degradation over time. Finally, since the vehicle has accumulated significant mileage, verify that all fluids—oil, coolant, brake fluid, and transmission fluid—are at the correct levels and not showing signs of degradation, such as darkening or sludge in the oil. If service records are available, confirm that time-based maintenance, such as brake disc corrosion checks and exhaust emissions system servicing, has been conducted in line with manufacturer recommendations.