2018 MG 3 1.5L Petrol · CU18 YBR

Corrosion of structural and braking components has emerged as the primary mechanical concern for this vehicle, as evidenced by the progression of advisories noted during the most recent test on 10 June 2026. While the car successfully passed that inspection following a minor rectification regarding the windscreen washer system, the inspector identified surface degradation on the offside front Macpherson strut, both rear brake back plates, and the rear axle. This follows a previous advisory from 2025 concerning the rear subframe, indicating a persistent trend of oxidation affecting the undercarriage and suspension mounting points that requires close monitoring to prevent future structural failure. Accumulating only 21,434 miles over an eight-year lifespan results in an average annual usage of approximately 2,679 miles, a figure significantly below the national average for a vehicle of this age. While low mileage often suggests limited mechanical strain on the drivetrain, it can also lead to accelerated oxidation of exposed metal components due to prolonged periods of inactivity in damp conditions. The MOT history confirms a consistent testing frequency since 2021, suggesting the vehicle has not suffered from extended multi-year lay-ups, yet the current corrosion advisories remain a direct consequence of the environment in which the vehicle has been stored and operated. During your test drive, pay particular attention to the front suspension performance by listening for any metallic knocking or clunking sounds when traversing speed bumps or uneven road surfaces, which could indicate that the corrosion noted on the Macpherson strut is beginning to affect the integrity of the damper or its mounting. You should also observe the steering for any pulling or vagueness that might suggest uneven wear or suspension misalignment, a recurring theme in the vehicle's history given the tyre-related advisories recorded in 2021 and 2022. Ensure the steering feels precise and that the vehicle tracks straight under both acceleration and braking. Regarding the braking system, the reported corrosion on the rear back plates warrants a physical inspection of the rear discs and pads for signs of uneven wear, binding, or reduced stopping efficiency. During the test drive, perform several controlled stops from moderate speeds to check for pedal judder or any grinding noises from the rear, which would suggest that the back plates or associated hardware are failing to support the braking components correctly. Given the noted corrosion on the rear axle and subframe, a visual check of these areas from underneath the vehicle is strongly advised to ensure that the oxidation remains superficial and has not compromised the structural rigidity of the chassis mounting points.