2015 BMW 428 2.0L Petrol · MP65 SDV

A pattern of rear inner-edge tyre wear has emerged as the defining mechanical narrative of this 2015 BMW 428. The March 2026 test, the eighth and most recent recorded, was a pass, but it carried advisories for both rear inner tyres being worn close to the legal limit and worn on the edge. This continues a trend visible across the record: rear inner-edge wear was first flagged in August 2020, and front tyres showing similar edge wear and sidewall damage were recorded in March 2023. Persistent unilateral or inner-edge wear on BMW rear axles is frequently linked to geometry settings, wheel alignment, or worn suspension components rather than simple tyre ageing, and the recurrence of this same advisory on different axles over multiple tests is a point worth scrutiny. Aside from tyres, the record is otherwise sparse on defects, with clean passes in 2021, 2024, and 2025, a single brake pad advisory in 2022, and a minor windscreen damage note that does not obstruct the driver's view. The mileage profile is unusually low for the vehicle's age. With 52,132 miles recorded over approximately eleven years, the annual accumulation sits at roughly 4,739 miles per year, which is well below average for a car of this vintage. The MOT record shows consistent annual testing from 2019 through 2026 with no significant gaps, suggesting the vehicle has been in regular use rather than laid up for extended periods, albeit covering relatively short distances. Low annual mileage can reduce wear on major drivetrain and engine components but also means consumables such as brake discs, callipers, and suspension bushes may have aged through corrosion and oxidation rather than mechanical wear. Cold starts and short journeys can also allow moisture to accumulate in the engine oil and exhaust system, so a buyer should not assume that low mileage equates to a mechanically fresh drivetrain. From a buyer guidance perspective, the rear inner-edge tyre wear is the priority item and warrants a thorough investigation. On a test drive, listen for any knocking or clonking from the rear suspension over uneven surfaces, which can indicate worn trailing arm bushes, top mounts, or shock absorber issues. Pay close attention to steering behaviour: any pulling to one side, vagueness through the centre of the wheel, or uneven steering effort returning to the straight-ahead position could suggest alignment or suspension geometry problems consistent with the tyre wear pattern. Inspect the rear tyres physically for uneven tread depth across the width, and check that a recent four-wheel alignment has been carried out, as simply replacing the tyres without addressing the underlying cause will result in the same wear recurring within a few thousand miles. Also examine the rear brake discs for any surface rust pitting, particularly given the low mileage, as discs can corrode unevenly when used infrequently. Additional checks should focus on the brake system flagged lightly in the 2022 advisory. On test, feel for any vibration or judder through the brake pedal under firm stopping, which would indicate warped or corroded discs, and listen for any grinding or squealing that could suggest worn pads now contacting worn discs. Inspect the front and rear brake pipes and flexible hoses for any corrosion or perishing, as BMW flexible hoses of this era are known to degrade internally and can cause a spongy pedal. Check for any oil seepage around the engine and gearbox, particularly from the valve cover gasket and oil filter housing, and verify that there are no warning lights illuminated on the dashboard. Finally, confirm that the service history includes timely brake fluid changes, as fluid deteriorates with age regardless of mileage, and ensure the tyres being fitted as replacements are of matching brand, size, and load rating on each axle to prevent the recurring edge wear from being compounded by rolling resistance differences.