2007 Mazda 3 1.6L Petrol · GL07 XDO

Corrosion of the vehicle structure and the rear sub-frame represents the primary mechanical concern for this Mazda 3, with these issues appearing as recurring advisories in the most recent tests. While the 2026-05-20 MOT pass confirms that structural rigidity is not currently significantly reduced, the progression from general under-vehicle corrosion in 2025 to specific mentions of the sub-frame and structure in 2026 indicates a continuing trend of oxidation. This pattern of structural advisories, combined with previous failures regarding suspension arm bushes and lighting, suggests that while the vehicle remains roadworthy, the integrity of the chassis and supporting components is under ongoing scrutiny. The vehicle has covered 94,408 miles over its 19-year lifespan, averaging approximately 4,969 miles per year. This is a relatively low annual mileage for a vehicle of this age, which can often mean components are subject to less frequent mechanical cycling but may be more susceptible to age-related degradation such as rubber perishing or corrosion from extended periods of standing. The usage profile shows consistent testing, though the low mileage means that wear on components like tyres and brake discs may be driven more by environmental exposure and time rather than heavy road use, as evidenced by the 2025 advisories for perishing tyres and pitted brake discs. A prospective buyer should pay close attention to the underside of the vehicle during a physical inspection, specifically looking for the extent of the corrosion on the rear sub-frame and the main structural members. During a test drive, it is essential to listen for any knocking, clunking, or creaking sounds when traversing uneven surfaces or speed bumps, which could indicate that the previously flagged worn suspension arm bushes have deteriorated further or that the structural corrosion is affecting suspension mounting points. Any sudden changes in steering feel or a tendency for the car to pull to one side should be investigated, as these can be symptoms of compromised suspension geometry or worn bushings. The braking system and tyre condition also require careful evaluation. Given the history of pitted and scored brake discs on both the front and rear, the buyer should check for any pedal judder or vibration under braking, which may indicate warped or unevenly worn discs. The tyres should be inspected not just for tread depth, but for signs of sidewall cracking or perishing, particularly on the rear, to ensure they have not reached the end of their serviceable life due to age. Ensuring that the braking components are not binding and that the stopping performance is consistent will be vital given the recorded history of disc wear.