2018 BMW 730 3.0L Diesel · AD11 BOE

The 2018 BMW 730’s latest MOT test on 2026-06-06 resulted in a clean pass, marking a stable maintenance trend over the past year. While the vehicle has not encountered any failures during this period, the presence of two recurring advisories from the 2025-05-14 MOT—both indicating slightly worn bushes in the front lower suspension bushes—suggests a gradual but persistent issue that requires attention. These advisories, classified under 5.3.2 (c) for worn suspension components, imply that the vehicle’s suspension system is experiencing cumulative wear, particularly in the lower shock absorber mounts. This pattern is concerning as it may indicate underlying structural fatigue or improper alignment, which could escalate if left unaddressed, potentially leading to further suspension failures or even steering linkage issues. The recorded mileage of 139,329 miles for a vehicle aged eight years represents a high annual usage rate of approximately 17,416 miles per year, which is notably elevated for its class. Such high mileage typically correlates with increased wear on critical components such as brakes, suspension, drivetrain elements, and fluid systems, as well as potential exposure to harsher driving conditions. While high mileage alone does not necessarily indicate mechanical failure, the combination of this usage rate with the recurring suspension advisories raises concerns about how aggressively the vehicle has been driven. Extended periods of high mileage without significant maintenance intervals may also contribute to accelerated degradation of consumables like brake pads, tyres, and engine fluids, warranting a thorough inspection of these areas. Given the recurring suspension advisories, the prospective buyer should prioritise a detailed inspection of the front lower suspension system. Visually inspect the shock absorbers and their mounts for any signs of oil leakage, which could indicate failing seals or internal damage. During a test drive, listen for unusual clunking or rattling noises from the front suspension, particularly when navigating bumps or corners, as these could signal further wear in the bushes or mounting brackets. Additionally, check for uneven tyre wear patterns, which may suggest misalignment or suspension misalignment caused by the worn mounts. Impending maintenance should include replacing the worn suspension bushes and assessing the condition of the shock absorbers, as these components are critical for vehicle handling and safety. If the suspension is found to be beyond economical repair, the buyer should consider the long-term costs of further suspension failures, which could include steering system or wheel alignment issues. For the broader physical inspection, the buyer should also examine the vehicle for signs of standing corrosion, particularly around the wheel arches, undercarriage, and brake components, as prolonged exposure to moisture can accelerate rusting. Given the vehicle’s age and high mileage, inspect the tyres for sidewall cracking or perishing, which can compromise structural integrity and safety. Check the 12V battery for signs of corrosion at the terminals and ensure it holds a charge when tested, as older batteries in high-mileage vehicles are more prone to failure. Fluid levels should be verified, with particular attention to the engine oil, brake fluid, and differential fluid, as these fluids degrade over time and should be replaced according to manufacturer recommendations—typically every 60,000 to 100,000 miles or every two to three years, depending on the fluid type. Lastly, verify the service history for any missed or overdue maintenance, such as timing belt replacement or exhaust emissions-related servicing, as these can significantly impact the vehicle’s long-term reliability.