2014 Mazda 3 2.0L Petrol · SD64 CFU

Corrosion of the rear subframe and brake piping represents the primary mechanical concern for this vehicle, showing a persistent trend of degradation in the braking and suspension systems. While the car passed its most recent test on 04 February 2026, the recurring advisories regarding the rear subframe and the previous major failure in January 2026 for a rough nearside rear wheel bearing indicate ongoing issues with structural oxidation and component wear. The history shows a progression from brake pipe corrosion in 2022 and 2023 to more widespread advisories involving both nearside and offside rear suspension arms and the subframe by 2025, suggesting that the oxidation is affecting multiple areas of the underbody. The recorded mileage of 106,299 miles over approximately twelve years equates to an average annual accumulation of roughly 8,858 miles. This usage pattern is typical for a vehicle of this age and suggests a consistent level of operation rather than long periods of inactivity or heavy commercial use. From a mechanical standpoint, this steady mileage profile means that components such as suspension bushes, wheel bearings, and braking hardware are subject to standard age-related wear and environmental exposure, which is consistent with the documented corrosion issues and the recent wheel bearing failure. A prospective buyer should pay close attention to the condition of the underbody, specifically the rear subframe and the suspension arms. Because the MOT records have repeatedly flagged corrosion on the nearside and offside rear suspension arms and the subframe, it is essential to inspect these areas for any signs of structural thinning or significant scaling. During a test drive, listen for any knocking, clunking, or irregular thudding sounds when driving over uneven surfaces or speed bumps, as these can be symptoms of failing suspension components or weakened mounting points. Additionally, the recent failure of the nearside rear wheel bearing suggests that other hub assemblies may be nearing the end of their service life; listen for any humming, droning, or grinding noises that increase in pitch with vehicle speed. The history of corroded brake pipes, particularly at the flexi-hoses, necessitates a thorough check of the entire braking system. While the major failure regarding excessively corroded front brake pipes was resolved in 2022, the advisories for rear brake pipe corrosion have persisted through multiple testing cycles. On a test drive, the braking performance should be evaluated for any unevenness, such as pedal judder or a pulling sensation to one side, which could indicate binding calipers or compromised hydraulic integrity. Ensuring that the brake lines are free from significant surface scale and that the pedal feel remains firm and consistent is vital given the documented history of oxidation in the hydraulic lines.