2015 Mazda 3 2.2L Diesel · VF64 BNX

Persistent corrosion of the brake lines has been the defining mechanical concern for this vehicle, appearing as a recurring advisory across multiple inspections since 2023. While the most recent MOT on 24 December 2025 resulted in a clean pass, the preceding test in January 2025 required intervention for both rear coil springs, which were recorded as fractured, alongside the ongoing monitoring of the brake pipe condition. The transition from a failed state in early 2025 to a clear pass by the end of that same year suggests that the identified structural and braking defects were addressed, though the history of recurring brake line corrosion warrants continued vigilance regarding the integrity of the hydraulic system. With 70,991 miles recorded over an eleven-year lifespan, the vehicle averages approximately 6,454 miles per year, a rate consistent with moderate, standard usage. This mileage accumulation does not suggest extended periods of inactivity or excessive high-speed motorway wear, meaning the mechanical components have likely been subjected to typical cycles of heating and cooling. Prospective buyers should note that while the annual mileage is unremarkable, the consistent presence of corrosion-related advisories indicates that the vehicle has been exposed to environmental conditions that affect exposed underbody components, regardless of the distance covered. During your test drive, focus specifically on the braking system and suspension performance, given the history of component failure. When applying the brakes, ensure the pedal feel is firm and consistent, with no sponginess or excessive travel that might suggest air in the lines or lingering issues with the hydraulic circuits. Listen intently for any metallic clunking or knocking noises from the rear axle when traversing speed bumps or uneven road surfaces, as this can indicate that the replacement coil springs were not seated correctly or that associated suspension bushings have reached the end of their service life. A thorough physical inspection of the vehicle underside is essential to confirm the current state of the brake pipes, as the previous advisories noted that they were covered in grease or other materials, which can sometimes mask the true extent of surface oxidation. Check for any signs of weeping fluid at the unions and ensure there is no visible flaking or deep pitting on the rigid metal lines. Furthermore, verify that the vehicle tracks straight under braking and that there is no pulling to either side, which would indicate a binding caliper or uneven pressure distribution in the braking system.