2004 Mazda MX-5 1.8L Petrol · NG04 CVC

The latest MOT test on 2025-01-21 resulted in a clean pass, though it included several persistent advisories that suggest a pattern of wear and minor corrosion issues rather than outright failure. Over the past six years, the vehicle has consistently passed MOTs with only minor advisories—particularly concerning the suspension components and seat belt anchorage corrosion—indicating a stable but ageing mechanical condition. The absence of failures or major defects in earlier tests, combined with the recurring surface corrosion advisories, implies that while the car remains roadworthy, its structural and functional integrity is gradually degrading due to prolonged exposure to environmental elements. This trend does not suggest rapid deterioration, but it does warrant heightened attention to prevent escalation, especially given the vehicle’s age and the potential for hidden wear in less accessible areas. The recorded mileage of 90,674 miles for a 22-year-old Mazda MX-5 is unusually low, averaging just 4,122 miles annually—a rate that typically reflects either very light usage or extended periods of inactivity. Such low mileage can mask underlying issues, as components like brakes, suspension, and drivetrain elements may have suffered from prolonged standing rather than active wear. However, the advisories on tyre wear and suspension corrosion suggest that even with minimal movement, environmental factors—such as damp conditions, road salt, and general exposure—have contributed to accelerated degradation. The nearside front tyre showing wear close to the legal limit, despite low mileage, raises concerns about uneven loading or potential misalignment, which could exacerbate further tyre damage if not addressed. Additionally, the extended periods between MOTs may have allowed minor issues to progress unnoticed, so a thorough inspection is essential to identify any latent problems. To proceed with a purchase, the prospective buyer should conduct a meticulous physical and functional inspection, focusing on the suspension and braking systems given the recurring advisories. Visually inspect the suspension components for signs of deeper corrosion beyond the surface level, particularly around the control arms, bushings, and strut mounts, as corrosion can weaken structural integrity and lead to premature failure. Listen for unusual noises during a test drive, such as clunking from worn suspension bushes or coil springs, or grinding from binding calipers or warped brake discs. The offside rear seat belt anchorage corrosion should be checked for any signs of rust propagation into the vehicle’s frame or mounting points, as this could compromise safety. Additionally, examine the tyres for uneven wear patterns, sidewall cracking, or signs of hydroplaning susceptibility, as the nearside front tyre advisory may indicate a need for rotation or alignment. For fluids and internal systems, the buyer should prioritise checking the engine oil, brake fluid, and coolant for signs of degradation or contamination, as these can degrade over time even with low mileage. Given the vehicle’s age, the 12V battery should be tested for capacity and terminal corrosion, as standing vehicles are particularly vulnerable to battery failure. Inspect the exhaust system for leaks or structural damage, as corrosion in the suspension advisories may extend to adjacent components. Finally, verify the service history for any missed or deferred maintenance, particularly for fluid top-ups, brake pad replacements, and suspension component servicing. With the current advisories, a proactive approach to addressing corrosion and wear will be crucial to maintaining the vehicle’s roadworthiness and safety over the coming years.