2015 Mazda 3 2.2L Diesel · AE15 OPH

Corrosion of the rear subframe and recurring issues with brake pipe degradation represent the primary mechanical concerns for this vehicle, as evidenced by the most recent MOT pass on 10 March 2026. While the vehicle has maintained a continuous pass record since 2019, the advisory history shows a persistent trend of structural and fluid-carrying component wear. Specifically, the rear subframe has been flagged for corrosion in both 2025 and 2026, and the brake pipes were noted as corroded and covered in grease across multiple tests in 2021 and 2023. This indicates an ongoing requirement to monitor the integrity of the chassis and braking system. The vehicle has covered 112,133 miles over its eleven-year lifespan, which equates to an average annual usage of approximately 10,194 miles. This mileage profile is consistent with typical UK usage patterns for a vehicle of this age. From a mechanical standpoint, this level of accumulation suggests that consumables such as tyres, brake pads, and suspension components will have undergone regular cycles of wear, which is reflected in the frequent advisories regarding tyre tread depth and brake pad thickness throughout the recorded history. Prospective buyers should pay close attention to the steering and suspension during a test drive, particularly following the 2026 advisory regarding slight play in the offside front track rod end ball joint. Listen for any knocking or clunking sounds when navigating uneven road surfaces or turning the steering wheel at low speeds, as these can be symptoms of worn ball joints or anti-roll bar linkages. The repeated advisories for tyres worn on the edges also suggest a need to check for uneven tyre wear, which can indicate underlying issues with wheel alignment or suspension geometry. Given the documented history of brake pipe corrosion and the ongoing advisory for subframe corrosion, a thorough inspection of the underside is essential. Check the brake lines for any signs of bubbling, heavy scaling, or weeping fluid, and examine the rear subframe to assess the extent of the oxidation. During the test drive, pay close attention to the brake pedal feel; any sponginess, pulsation, or uneven braking performance could indicate that the previously noted corrosion in the brake pipes or calipers is affecting hydraulic integrity.