2018 Mazda MX-5 1.5L Petrol · OY18 BDF

The most recent MOT on 18 May 2026 was passed, but it carried two advisories concerning rear brake disc condition and rear pad wear. Earlier in the series, the 2025 MOT recorded a major failure on both front brake pads and discs, which required remedial work before the vehicle could be re‑tested and passed in 2026. Apart from the recurring rear‑brake advisories, the record shows a clear improvement after the 2025 failure, indicating that the critical front‑brake items have been addressed and the vehicle is now mechanically stable, though the rear braking system is approaching the end of its service life. At eight years old the MX‑5 has logged only 33,733 mi, an average of roughly 4,200 mi per year. This is well below the typical UK usage pattern and suggests the car has spent considerable periods idle or has been driven lightly. Low annual mileage generally reduces wear on engine, transmission and suspension components, but prolonged standing can accelerate rubber perishing, battery sulphation and corrosion of brake hardware. There are no large mileage spikes that would point to a period of heavy abuse, so the wear observed is more likely a function of age rather than high‑stress operation. The brake system deserves close scrutiny. Although the front discs and pads have presumably been replaced after the 2025 failure, verify the current disc thickness (minimum 2 mm) and inspect the pads for uniform wear. On a test drive listen for any pulsation or judder through the pedal, which can indicate residual disc warping or uneven pad deposition. The rear disc advisories indicate pitting and thinning; these components are typically replaced in pairs, so anticipate a near‑future rear‑brake service. Examine the rear brake fluid for moisture content – a dark, gritty appearance suggests it is due for a change. The 2022 tyre advisories flagged slight cracking on both rear sidewalls; inspect the tyres for any dry rot, bulges or loss of tread depth, and be prepared to replace them if the tread is below 1.6 mm or if sidewall integrity is compromised. Given the car’s age and low mileage, a thorough age‑related inspection is prudent. Check the 12 V battery voltage under load and look for any signs of sulphation or leaking; a battery older than four years often needs replacement even on low‑use cars. Inspect all fluid levels – coolant, brake, power‑steering and gearbox – and confirm they have been changed at least every two years, as fluids degrade with time regardless of mileage. Examine suspension bushings, ball joints and coil springs for any cracking, corrosion or excessive play, especially if the car has been stored outdoors. Look over the exhaust system for rust or perforations, and ensure the timing chain (the MX‑5’s engine uses a chain rather than a belt) shows no abnormal noise. Finally, verify the service book for regular oil changes and any recorded major works; a well‑documented history will give added confidence in the vehicle’s overall roadworthiness.