2015 Mazda 6 2.2L Diesel · SM15 OCU

The 2015 Mazda 6 passed its most recent MOT on 1 June 2026 at 32,089 miles, but the record reveals a maintenance pattern that is stable at best and borderline at worst. The tester flagged corrosion on both rear lower suspension arms and a corroded nearside front brake pipe, all classified as "not seriously weakened" or "covered in grease or other material." These are not fresh defects. They are recurring advisories that have persisted across multiple tests without meaningful remedial work. The vehicle remains roadworthy today, yet the trend suggests a previous owner willing to pass MOTs without addressing underlying deterioration. The mileage profile is unusually low for an 11-year-old vehicle. At roughly 2,917 miles per year, the car has covered only 32,089 miles since 2015. The MOT history shows a gap of nearly two years between the May 2023 test at 23,908 miles and the May 2024 test at 25,764 miles, a period during which just 1,856 miles were added. The jump from 25,764 miles in May 2024 to 29,191 miles by May 2025 represents 3,427 miles in one year, and then only 2,898 more miles were covered in the twelve months leading to June 2026. This uneven accumulation pattern points to periods of very light use punctuated by occasional bursts of driving. Low mileage can preserve consumables, but it does not protect brake lines or suspension components from corrosion, particularly if the vehicle has stood for extended periods. The most persistent concern across the record is brake pipe corrosion. The nearside front brake pipe was flagged as corroded and covered in grease or other material in both the May 2024 and June 2026 tests. In the failed test on 30 May 2024, the offside front brake pipe was actually leaking, a serious hydraulic fault that should have prompted immediate repair. The fact that the same area reappeared as an advisory one year later raises questions about whether the repair was cosmetic rather than structural. A buyer should have the entire brake line run inspected for pitting and active corrosion, particularly at unions and where pipes pass through subframes or wheel arches. Suspension corrosion is the second recurring theme. Both rear lower suspension arms have been flagged as corroded but not seriously weakened in three separate tests spanning 2024 to 2026. This is a slow-developing issue, but the lack of any repair action across three consecutive MOT cycles suggests the corrosion may be progressing beneath the surface. Tyre condition has also been a consistent advisory, with perishing and edge wear appearing on both front and rear axles across multiple years. This points to either infrequent use causing sidewall degradation or alignment and suspension geometry issues that are accelerating uneven wear. A buyer should physically inspect the rear suspension arms for section loss, check tyre dates for age-related cracking, and verify that the brake lines have not been merely cleaned and greased rather than replaced.