2004 Mazda MX-5 1.6L Petrol · A25 ALD

A pattern of recurring oil‑seal leakage and progressive corrosion dominates the mechanical narrative of this 2004 MX‑5, highlighted by a 2022 MOT failure that recorded a fractured nearside front coil spring, excessive off‑side cab corrosion and an off‑side headlamp aim that was too high. Since that failure the car has passed three successive tests, each still noting a non‑excessive oil leak and various corrosion advisories, indicating that the major defects have been addressed but that underlying leakage and rust remain persistent concerns. At 154,152 mi the vehicle averages roughly 7,000 mi per year, a mileage rate that sits comfortably within normal usage for a car of this age and suggests no periods of prolonged inactivity. The steady accumulation of miles means consumables such as suspension bushings, brake pads, tyres and drivetrain components will have experienced typical wear, but the mileage alone does not explain the repeated corrosion advisories, which point to environmental exposure rather than high‑use stress. Prospective buyers should inspect the source of the oil leak – look for drips around the valve cover gasket, oil filter housing or rear main seal and verify that the oil level remains stable after a short soak. Examine the underside for any flaking or pitting, especially around the nearside front inner cab area flagged in 2022, and probe the seat‑belt anchorage zones and rear suspension mounting points for softened metal or rust‑induced weakness. A tactile check of the front coil springs and lower suspension ball joints is advisable; any creaking, knocking or uneven ride height may indicate that the previous spring fracture was not fully resolved or that associated bushings have deteriorated. The rear tyre inner‑edge wear noted in 2025 suggests a possible alignment or suspension camber issue – a road test should include a straight‑line run to detect any pull to one side and a gentle sweep over bumps to listen for clunking from the lower ball joints. Verify that the headlamp aim is now within legal limits and that the rear exhaust leak flagged in 2022 has been sealed, watching for any faint hissing or black smoke at low revs. Finally, confirm that the seat‑belt anchorage corrosion has not progressed to the point of compromising restraint performance by checking for loose fittings or excessive play when the belts are pulled taut.