1998 Mazda MX-5 1.8L Petrol · R35 OBL

The most recent MOT on 6 July 2026 was passed, with a single advisory noting corrosion to the off‑side rear inner integral body structure that has not yet compromised structural rigidity. Over the past six years the record shows a mixture of advisories for under‑body and suspension corrosion and occasional fluid‑related notes, punctuated by two major failures – seat‑belt anchorage loss in June 2025 and exhaust lambda out‑of‑spec readings in 2024 and again in 2025. Both of those major items were rectified, as evidenced by the clean pass in the latest test, indicating that the maintenance trend has shifted from a period of significant safety‑related faults to a more stable, albeit still corrosion‑prone, condition. At 95,110 mi the MX‑5 averages roughly 3,400 mi per annum, which is markedly below the typical usage for a 28‑year‑old roadster. Such low annual mileage often reflects long spells of storage or very gentle driving. While this reduces wear on engine, transmission and brake components, it also encourages age‑related deterioration – rubber seals, hoses and bushings can become brittle, and corrosion can advance unchecked when the car sits for extended periods. The mileage figure therefore suggests that the vehicle’s mechanical parts may be in relatively good condition, but the age‑related factors merit close scrutiny. When you inspect the car, give particular attention to the rear inner sill and wheel‑arch area where the advisory cites corrosion; probe the metal for any sign of perforation, thinning or flaking that could affect crash integrity. Examine all suspension arms, both upper and lower, for pitting, cracked paint or loss of structural thickness, and listen for clunks or excessive play when the car is rocked over the wheels. The off‑side rear shock absorber was noted with light oil mist, so check for any oil seepage around the damper and feel for a soft or uneven rebound on a brief bounce test. Verify that the seat‑belt anchorage points feel solid when pulled and that the retractor mechanism operates smoothly, as previous failures indicate they have required replacement. Finally, confirm that the exhaust lambda sensor now reads within limits by observing a stable idle and checking for any lingering fuel‑trim warnings on the dashboard. Given the car’s age, inspect the tyres for sidewall cracking, dry rot or loss of tread even if the depth appears adequate, and ensure the wheels are true and free of rust on the rims. Test the 12 V battery voltage and, if possible, perform a load test; a battery older than six years often needs replacement regardless of apparent charge. Check the condition of all fluids – coolant should be clear and at the correct level, brake fluid should be free of moisture (a simple brake‑fluid tester can confirm), and engine oil should be changed at regular intervals despite the low mileage, as oil degrades over time. A thorough visual review of the service book for stamps confirming timely oil, filter, coolant and brake‑fluid changes will give added confidence that the vehicle has been kept in a roadworthy state despite its modest use.