1999 MAZDA MX-51.8L PETROL

The 1999 Mazda MX-5 passed its most recent MOT on 11 February 2025 at 131,110 miles, but the maintenance trend is clearly worsening rather than stable or improving. That pass came only after a serious failure on 30 January 2025 at 131,085 miles, which flagged structural corrosion to both inner sills, a fractured nearside rear coil spring, a missing offside rear wheel fixing, a major central exhaust leak, and multiple deteriorated suspension ball joint dust covers. A further failure on 16 January 2025 at 131,050 miles added excessive track rod end play and emissions non-compliance. The two consecutive failures in January followed by a conditional pass in February suggest a last-minute scramble to address safety-critical items rather than a consistent programme of preventive upkeep. Advisories for corrosion throughout the underside, corroded sub-frames, and corroded front suspension arms carried through from the failure straight into the pass, meaning the underlying decay was noted but not remedied. The mileage profile supports a picture of light use punctuated by periods of standing. Between the clean pass on 28 September 2021 at 127,098 miles and the pass on 3 October 2022 at 128,654 miles, the car covered just 1,556 miles in roughly 12 months. Then between October 2022 and January 2025, over about 27 months, it added only 2,431 miles, averaging under 90 miles per month. That is exceptionally low even for a 27-year-old specialist car. The near-identical readings across the three January and February 2025 tests, just 60 miles apart, indicate the vehicle was likely stationary for long stretches and only moved for testing. Prolonged sitting accelerates corrosion of brake components, seals, and structural sections, which aligns with the pattern of defects now appearing. A buyer should inspect the inner sills, floor-to-sill joints, and sub-frame mounting points in person, as the tester repeatedly recorded corrosion to an extent that structural rigidity was significantly reduced. The nearside rear coil spring was fractured in January 2025 and must be confirmed as replaced rather than simply re-tested after temporary repair. Both front upper and lower suspension arm ball joint dust covers were deteriorated, so joint condition and play need physical checking. The central exhaust leak and emissions failure point to a degraded exhaust system and possible engine or catalytic converter wear, requiring a live emissions test under load. Missing wheel fixings and worn rear tyres suggest basic pre-check discipline was absent, so wheel studs, hub faces, and tyre age should all be examined. Brake components, especially calipers and handbrake mechanisms, deserve close attention given the low mileage and long stationary periods, which can cause binding and surface corrosion on discs and drums. The underside needs a thorough inspection on a lift, not just a roadside check. Corrosion advisories on the sub-frames and all front suspension arms were carried over from failure to pass without being resolved, so their actual structural integrity remains uncertain. Rubber bushes, gaiters, and seals will have dried out during extended periods of non-use, increasing the risk of sudden failure once the car returns to regular service. The electrical faults on the offside in January 2025, combined with the non-compliant registration plate, hint at haphazard repairs rather than systematic maintenance. Any prospective buyer should budget for a comprehensive underside restoration, suspension refresh, and full exhaust replacement before relying on this car as a regular-use vehicle.