2016 Mazda 3 1.5L Diesel · ST66 BCV

Recurring corrosion on the braking system and emerging suspension damping issues define the mechanical profile of this vehicle, as evidenced by the most recent MOT pass on 04 June 2026. The brake pipe network has been a persistent advisory since at least 2020, with multiple tests noting corrosion across the nearside and offside front and rear lines. This pattern of corrosion has remained a constant factor throughout the testing history, even coinciding with a dangerous failure in May 2025 due to a nearside rear brake pad being below the legal thickness limit. The most recent inspection also introduced new advisories regarding reduced damping effects on both rear shock absorbers, suggesting a shift from purely corrosion-related concerns to potential suspension component degradation. The vehicle has covered 52,532 miles over its ten-year lifespan, representing an average annual accumulation of approximately 5,253 miles. This is a low mileage profile for a 2016 model, which can sometimes result in less frequent mechanical movement of components. While lower mileage typically implies less wear on the drivetrain, the MOT history shows that specific components like brake pipes and shock absorbers are still subject to age-related degradation and environmental corrosion. There is a notable gap in the testing record between March 2022 and May 2024, which should be noted when considering the continuity of the vehicle's documented roadworthiness. A prospective buyer should pay close attention to the braking system and the rear suspension during a physical inspection and test drive. Given the long-standing advisories regarding corroded brake pipes, it is essential to check for any signs of fluid weeping or active leaks around the flexi hoses and hard lines. On the road, listen for any unusual noises when applying the brakes or feel for a spongy or inconsistent pedal feel, which could indicate that the corrosion is impacting the integrity of the hydraulic system. The failure in 2023 regarding excessive parking brake lever movement also warrants a check to ensure the handbrake is now correctly adjusted and holds the vehicle firmly on an incline. The new advisories for reduced damping in the rear shock absorbers require specific attention during a test drive. You should listen for knocking or clunking sounds when driving over uneven surfaces or speed bumps, and feel for excessive bouncing or a lack of stability when the vehicle's weight shifts. If the rear of the car feels unsettled or continues to oscillate after hitting a bump, the shock absorbers may require replacement. Additionally, because the record shows previous issues with tyre wear and wiper blade defects, a visual inspection of all consumable items should be conducted to ensure they meet current legal standards.