2003 Mazda MX-5 1.8L Petrol · KL53 AFA

Persistent corrosion on the rear sills and an escalating pattern of braking system issues define the mechanical profile of this vehicle, as evidenced by its most recent pass on 02 March 2026. While the vehicle has avoided major failures in recent years, the MOT history shows a recurring trend of structural corrosion advisories on the nearside and offside rear integral body structures dating back to 2020. More recently, the focus has shifted to the braking system, with the 2026 test recording advisories for thin pads on both front and rear axles, alongside imbalances in both front and rear braking requirements. The recorded mileage of 49,125 miles over a 23-year period represents an average annual accumulation of approximately 2,136 miles. This low usage pattern suggests the vehicle has spent significant periods stationary, which is consistent with the recorded advisories regarding perishing or cracking tyres and pitted brake discs. Mechanically, such low-frequency usage can lead to the degradation of rubber components and the uneven settling of braking surfaces, as seen in the recent advisories for tyre sidewall cracking and imbalanced brake requirements. A prospective buyer should prioritise a thorough inspection of the rear sills and chassis mounting points, given the multi-year history of corrosion advisories. While these were recorded as not significantly reducing structural rigidity, the progression from outer sills to areas within 30cm of a mounting suggests the corrosion is established. During a test drive, pay close attention to the braking performance; the recent advisories for imbalanced braking and thin pads suggest the need for a full inspection of the calipers, discs, and pads. Listen for any uneven pulling under braking or a pulsating sensation through the pedal, which could indicate the reported imbalances or uneven disc wear. The history of oil leaks around the undertray and the advisory for perishing tyres also warrants attention. Check the engine bay and undercarriage for any fresh or active oil weeping that exceeds the previous non-excessive levels noted in 2019. Additionally, inspect the condition of all tyres, specifically looking for sidewall cracking or bulges, as the 2025 and 2026 records confirm that rubber degradation remains an ongoing issue. Any unusual knocking or creaking from the rear suspension area should be investigated, as it may relate to the areas where structural corrosion was previously identified.