2018 BMW M4 3.0L Petrol · YA55 DEC

The most recent MOT test passed on 29 November 2025, though it carries two specific advisories regarding tyre wear and a minor exhaust leak. Reviewing the broader history, the vehicle experienced a significant failure in November 2024 due to a missing secondary catalytic converter. This indicates that the vehicle likely underwent exhaust modifications or suffered a component loss that required rectification to meet emissions standards. While the vehicle has maintained a passing record, the progression from a major component failure to current advisories for wear and minor leaks suggests that maintenance attention is shifting toward consumable items and minor sealing issues. The recorded mileage of 44,898 miles over an eight-year period represents an average of approximately 5,612 miles per year, which is considerably lower than typical usage for this vehicle type. While this low mileage suggests reduced wear on the internal engine components and drivetrain, it also implies the vehicle may have spent significant time stationary. For a high-performance machine like an M4, infrequent use can lead to specific issues such as battery health decline, tyre flat-spotting, and the degradation of rubber seals and fluids. The mileage profile is consistent with a seasonal or enthusiast-owned vehicle rather than a high-use daily driver. On a test drive, you must pay close attention to the exhaust system to address the advisory regarding a minor leak. Listen for any irregular rasping, ticking, or increased engine noise, particularly during deceleration or under load, as this could indicate a failing gasket or a small puncture in the manifold or exhaust pipework. Additionally, inspect the offside front tyre for the reported edge wear. Uneven wear on the outer shoulder is often a symptom of incorrect wheel alignment, worn suspension bushes, or incorrect camber, all of which can negatively impact high-speed stability and cornering precision. Given the low annual mileage, a physical inspection of the tyre sidewalls is essential to check for perishing or cracking caused by age-related rubber degradation. You should also examine the brake discs for heavy surface corrosion or pitting, which can occur if the vehicle has been standing for long periods, and test for binding calipers that may have become seized due to inactivity. Finally, ensure that the service history confirms that all time-sensitive fluids, such as brake fluid and coolant, have been changed according to the manufacturer's calendar-based intervals rather than solely on mileage, to ensure the long-term integrity of the cooling and braking systems.