2015 Mazda 3 2.2L Diesel · MM65 WJU

The vehicle currently presents as roadworthy, but the maintenance trend shows a concerning development regarding underbody corrosion. While the most recent test in December 2022 at 82,979 miles identified corroded brake pipes on both front and rear sides, the vehicle passed despite these defects. The presence of grease covering the pipes suggests an attempt to mask corrosion rather than replace the affected components. This marks a shift from the clean record seen in 2021 to a state where structural degradation is affecting the braking fluid lines. The mileage pattern averages approximately 7,500 miles per year, which is consistent with typical usage for an eleven-year-old vehicle. There is a significant gap in the data between the December 2022 test and the current date over three years later, during which the vehicle covered roughly 15,000 miles. This rate of accumulation suggests the car is used regularly, but the lack of a recent MOT record means the condition of the corroded brake pipes may have worsened significantly since the last professional inspection. A buyer must conduct a thorough physical inspection of the braking system to determine the extent of the pipe corrosion noted in 2022. The recurring reports of thin brake pads in 2019 and 2020 indicate a history of reactive maintenance where components were replaced upon failure rather than scheduled servicing. Attention should be paid to the chassis and suspension mounting points for structural rust, as the corrosion on the brake lines often correlates with broader environmental damage to the underbody. Testing the integrity of the brake lines under pressure is essential to ensure the corrosion has not compromised the metal to the point of imminent failure.