2008 Mazda MX-5 2.0L Petrol · SO08 VHD

The 2008 Mazda MX-5 currently holds a valid MOT certificate dated 13 April 2026, passed cleanly at 73,570 miles with zero defects. That result is significant because it follows a serious failure just twelve days earlier on 1 April 2026 at 73,568 miles, where both rear sub-frames and rear suspension mounting areas were flagged as corroded and seriously weakened. The immediate re-test pass indicates the structural defects were repaired, likely involving welding or replacement of corroded sub-frame and sill sections. The maintenance trend is therefore improving, though the underlying history reveals a recurring corrosion problem that demands careful scrutiny. The mileage profile is notably low for an eighteen-year-old sports car. Between the January 2025 test at 66,549 miles and the April 2026 re-test at 73,570 miles, the car covered roughly 7,021 miles in fifteen months, which is modest but not negligible. Earlier intervals show similarly restrained use, with only 3,184 miles added between January 2024 and January 2025. The annual average of approximately 4,087 miles suggests light, irregular use rather than sustained daily driving. This pattern can preserve mechanical components but also raises the risk of moisture ingress and standing corrosion, particularly in box sections and sub-frame mounts that rely on regular driving heat cycles to dry out. The corrosion history is the central concern for any prospective buyer. The January 2024 failure at 63,357 miles cited excessive corrosion and holing in the nearside rear inner sill within the suspension mounting prescribed area. By April 2026, the same category of defect had spread to both sides, affecting both rear sub-frames and both rear suspension mounting areas. This progression suggests the initial repair either did not address the root cause or that the car was subsequently stored in conditions that accelerated corrosion. A buyer should inspect the repaired sub-frames and sills in person, checking for fresh underseal that may be concealing poor-quality welding or filler. Tap-testing or a physical inspection by a body shop experienced in structural corrosion assessment is strongly advised. Beyond the structural repairs, the low-mileage pattern warrants attention to consumable components that deteriorate with age and lack of use rather than mileage alone. Tyres should be checked for sidewall cracking and date codes, as rubber perishes regardless of tread depth. Brake calipers and discs may exhibit sticking or surface corrosion from prolonged standing. Suspension bushes, while not flagged in the most recent pass, should be examined for perishing given the car's age. The clean April 2026 result is reassuring on paper, but the severity and recurrence of the corrosion failures mean the quality of the remedial work is the true determinant of this car's ongoing roadworthiness.