2003 Mazda MX-5 1.8L Petrol · CP03 WLL

This vehicle presents a concerning history of structural and suspension corrosion, particularly affecting the nearside (N/S) mounting points and subframe, which requires immediate verification of chassis integrity. The most recent test in December 2022 resulted in a pass, yet it flagged a corroded brake pipe covered in grease alongside widespread corrosion of suspension components and the rear subframe. This follows a dangerous failure in June 2019 where the N/S suspension mounting was excessively corroded and the seat belt anchorage strength was significantly reduced, alongside a dangerously low tread depth on the rear tyre. With 89,807 miles recorded over approximately 23 years, the annual accumulation rate is approximately 3,905 miles, indicating relatively light usage. Despite the low mileage, the corrosion history suggests prolonged exposure to corrosive elements or environmental factors rather than purely high-speed wear, evidenced by the repeated advisories on sills, wishbones, and subframes dating back to 2016. The vehicle has experienced periods of roadworthiness followed by specific failures, such as the 2019 suspension anchorage failure, indicating that the car may have been subject to environmental stress or specific localized damage rather than general mechanical fatigue. Inspect the N/S suspension mounting area for signs of significant rust reducing structural strength, as a previous failure in 2019 cited excessive corrosion here. Examine the floor and inner/outer sills for perforation; the 2019 failure noted reduced strength in the seat belt anchorage due to corrosion on the N/S side, and the 2022 advisory confirmed outer sills are corroded. Additionally, check the rear subframe for corrosion, as the latest record flags this component as corroded but not holed, though structural integrity remains a primary concern given the age and history. Brake maintenance is critical, as the advisory in December 2022 specifically noted a corroded brake pipe covered in grease, which could indicate a previous repair attempt or a blockage. Verify brake pad thickness, as advisories for low pads were recorded in 2019, 2020, and 2021. Ensure the rear tyre tread depth is above 1.6mm, as a dangerous failure was recorded in June 2019 due to insufficient tread on the rear nearside tyre. During a test drive, listen for any unusual noises from the suspension and check for steering pull, which could indicate uneven brake wear or suspension geometry issues exacerbated by the corroded components.