1999 Mazda Demio 1.3L Petrol · V556 GDL

Chronic structural corrosion on the offside rear and recurring wear in steering and suspension components form the defining mechanical story of this 27 year old Mazda Demio. The most recent test on 12 September 2024 was recorded as a pass, but it carried the largest cluster of advisories in the recorded sequence, including engine mounts noted as slightly worn, a slightly loose exhaust heat shield, slight corrosion to the exhaust system, the same offside rear structural corrosion finding first raised three years earlier, and worn rear axle swivel pins and bushes on both sides. The earlier failure at the August 2022 test, with excessive play in the nearside track rod end ball joint and a deteriorated offside ball joint dust cover, demonstrates that steering wear is not a one-off observation, and the pattern of advisories across four consecutive tests suggests a vehicle that is progressively accumulating age-related defects rather than one that has been mechanically refreshed. Annual mileage over the recorded life of the car is unusually low for a vehicle of this vintage, averaging roughly 4,000 miles per year against the recorded odometer reading of 108,423 miles. This kind of low accumulation is consistent with light use as a secondary or errand car, but it also implies extended periods of standing, which on a Demio of this age typically encourages corrosion of underbody structural members, stiffening of rubber suspension bushes, oxidation of brake hydraulic components, and drying out of oil and grease in steering linkages. The fact that the offside rear chassis corrosion was first flagged at the September 2022 test and was still being recorded as an advisory at the September 2024 test, two years and roughly two tests later, suggests that the corrosion is being monitored rather than actively repaired, and a buyer should expect it to be raised again at the next test and to worsen progressively until properly treated. A prospective buyer should pay particular attention on a physical inspection to the offside rear chassis leg, the rear floor pan extensions, and the inner wheel arches, looking for paint bubbling, surface scaling that can be scraped away with a screwdriver to reveal pitted metal, and any evidence of previous welding or underseal patching. On a test drive, listen for clonks from the worn rear axle swivel pins and bushes over speed humps and uneven B-roads, particularly a dull thudding noise from the rear axle as the suspension loads and unloads. The slightly worn engine mounts noted in 2024 are worth probing by selecting reverse and drive with the brakes held, feeling for a pronounced shunt or shudder through the cabin as the engine rocks on its mountings. Steering should also be exercised fully lock to lock with the car stationary and the engine running, listening for any notchiness or clicking that could indicate the track rod end wear flagged in 2022 is returning, and the offside ball joint gaiter should be inspected by hand for splits or grease loss. Braking response deserves close attention because front brake pads were already noted as wearing thin at the 2022 tests, and on a low mileage car of this age the caliper slider pins and rear drum or caliper mechanisms are more likely to have seized than worn through. Check for a firm pedal with no sponginess, listen for any binding or scraping from the front discs as the car rolls to a stop, and verify that the handbrake holds the vehicle on an incline without creeping. The slightly corroded exhaust system and loose heat shield should be inspected from underneath for any blueing of joints, audible blowing under load, or daylight visible through the silencer box, as exhaust deterioration of this age typically advances quickly once surface corrosion is established. Any further test should be arranged with a specialist familiar with Japanese market imports, since structural corrosion items and component sourcing for a 1999 Demio can be more involved than for mainstream UK volume models.