2015 Mazda 6 2.2L Diesel · SM15 OCY

The vehicle remains roadworthy but the maintenance history reveals a concerning trend of progressive structural corrosion and component wear. While the most recent test in August 2025 at 94,623 miles was a pass, it followed a failure just the previous day where multiple suspension and lighting issues were identified. The persistence of corrosion on the front and rear sub-frames and suspension arms indicates that while the vehicle has not yet reached a critical point of structural failure, the chassis is subject to ongoing environmental oxidation. The mileage pattern is remarkably consistent for an eleven-year-old vehicle, averaging approximately 8,600 miles per year. The record shows steady progression from 80,001 miles in June 2023 to 87,536 miles in July 2024, finally reaching 94,623 miles by August 2025. This regular use suggests typical operation rather than long periods of standing, which explains the gradual degradation of rubber components and the perishing of the tyre surfaces noted across several years. A buyer must conduct a thorough underbody inspection focusing specifically on the sub-frames and suspension mounting points. The tester has repeatedly flagged flaking and corrosion in these areas since 2023, and the transition from minor wear to excessively worn bushes in early 2025 suggests the suspension geometry is nearing its limit. Furthermore, the history of corroded brake pipes and binding calipers requires a close look at the hydraulic system to ensure that previous repairs were comprehensive and that internal corrosion is not migrating further through the lines.