2015 BMW 730 3.0L Diesel · LL65 YMS

The latest DVSA MOT test on 2026-06-22 resulted in a passing outcome, though it highlighted a minor failure related to the near-side front constant velocity (CV) drive shaft boot, which was found to be severely deteriorated. This marks a return to a maintenance pattern that has otherwise remained stable, with no failures or critical defects recorded in the preceding two years prior to this test. The recurring advisories from previous MOTs—both near-side and offside front CV boot failures—suggest a persistent issue with the CV joints, which could indicate underlying wear in the joint bearings or misalignment, warranting closer attention during inspection. While the vehicle has not failed an MOT due to these CV-related issues, the repeated advisories imply that the CV assemblies have reached a critical stage of degradation, potentially compromising torque transfer efficiency and increasing the risk of joint failure or seal leaks. The vehicle’s recorded mileage of 141,786 miles over approximately 11 years equates to roughly 12,890 miles annually, which is notably high for a 2015 BMW 7 Series, particularly given its performance-oriented drivetrain and suspension components. Such usage levels typically accelerate wear on consumables like brake pads, suspension bushes, and fluid systems, as well as on drivetrain elements such as CV joints, universal joints, and transmission mounts. The absence of significant mileage gaps suggests the vehicle has been in active use, which may have contributed to the observed CV boot deterioration. Additionally, high-mileage vehicles are more prone to issues arising from prolonged standing, such as brake disc corrosion, caliper binding, or fluid degradation due to stagnation, though the current mileage history does not explicitly indicate prolonged idleness. For the prospective buyer, the most critical areas to inspect are the front CV joints and their associated boots, as the recurring MOT advisories strongly suggest that these components are nearing or have exceeded their operational lifespan. On a test drive, listen for unusual clunking or rattling noises from the front wheels, particularly when transitioning between acceleration and deceleration, which could indicate CV joint bearing wear or misalignment. Visually inspect the CV boots for tears, cracks, or oil leaks around the joints, and check for excessive play or binding in the steering wheel when turning sharply. If the CV joints are confirmed to be failing, replacement is strongly recommended to prevent torque loss, excessive vibration, or catastrophic joint failure, which could lead to drivetrain damage or loss of control. Additionally, verify the integrity of the rear wheels, as the 2022 MOT failure highlighted significant fractures, suggesting that the wheel rims may have structural weaknesses. Inspect the rims for cracks, corrosion, or deformations, and ensure they are securely mounted to the vehicle, as any compromise could compromise roadworthiness and safety. Beyond the CV joints and wheels, the buyer should conduct a thorough inspection of the suspension system, given the high mileage and potential for wear in the front suspension components. Check for uneven tyre wear patterns, which could indicate misalignment or suspension binding, and examine the suspension bushes and coil springs for signs of excessive play, cracks, or corrosion. Listen for clunking noises from the suspension during cornering or over bumps, which may indicate worn suspension mounts or damaged control arms. Fluid checks are also essential; top up or replace the brake fluid, coolant, and differential/transmission fluids, as these degrade over time and can lead to system failures. Finally, inspect the tyres for sidewall perishing, which is common in older vehicles due to prolonged exposure to UV light and temperature fluctuations, and ensure they meet the legal minimum tread depth of 1.6mm. Given the vehicle’s age and usage, a comprehensive service history should be reviewed to confirm that time-based maintenance tasks, such as timing belt replacement (if applicable) and exhaust system servicing, have been completed as recommended by BMW.