2016 BMW 520 2.0L Diesel · SF66 AAG

The most recent MOT test for the 2016 BMW 520 was conducted on 2025-12-08 and resulted in a clean pass, indicating no defects were found at that time. However, the vehicle’s MOT history reveals a pattern of recurring advisories related to brake pipe corrosion and loose brake components, particularly from 2021 through 2023. While the advisories have not progressed to failures in the past two years, the persistent issues suggest a systemic problem with the brake system’s integrity, likely exacerbated by environmental exposure and operational stress. The fact that these advisories have been present intermittently over several years implies either a design or installation flaw, or prolonged exposure to corrosive conditions that have not yet reached critical thresholds. For a prospective buyer, this trend warrants careful attention to prevent potential brake system failure, which could compromise road safety and incur significant repair costs. The recorded mileage of 126,840 miles for a vehicle aged approximately ten years represents an unusually high annual usage rate of around 12,684 miles per year. This level of mileage, particularly for a car of this age, typically indicates either heavy daily use or periods of prolonged inactivity followed by rapid accumulation. High mileage accelerates wear on critical components such as brakes, suspension, drivetrain elements, and fluid systems, increasing the likelihood of premature failure or reduced component lifespan. The absence of service records or mileage-based maintenance intervals further complicates the assessment, as wear patterns may not be fully documented. Buyers should be particularly cautious about the brake system, given the advisories and the vehicle’s mileage, as both factors contribute to increased stress on this subsystem. To conduct a thorough physical inspection, the prospective buyer should begin by examining the brake system for signs of further corrosion or swelling in the brake pipes, which could indicate internal failure or fluid leakage. Listen for unusual noises during a test drive, such as grinding or squeaking, which may signal worn brake pads or warped discs. Inspect the brake backplates for any signs of loosening or damage, as the 2023 advisory suggests this area may be prone to instability. Check for uneven tyre wear patterns, which could indicate misalignment, suspension issues, or brake drag, all of which are common in high-mileage vehicles. Additionally, verify the condition of the suspension components, including coil springs, shock absorbers, and suspension bushes, for signs of excessive play, cracks, or fluid leaks, as these can degrade over time and lead to handling problems. Beyond the mechanical checks, the buyer should also assess the vehicle’s overall condition for signs of standing corrosion, particularly around the undercarriage, wheel arches, and exhaust system, where moisture and road salt can accelerate rust progression. Given the vehicle’s age and mileage, inspect the tyres for sidewall cracking or perishing, which can compromise structural integrity and reduce tread life. Test the 12-volt battery and associated electrical systems for signs of weakness, such as dim lighting or difficulty starting, as older batteries and parasitic drains can lead to unexpected failures. Finally, since the vehicle has not undergone a full service in the past year, the buyer should prioritise checking fluid levels—particularly brake fluid, coolant, and differential oil—for signs of degradation or contamination. Brake fluid should be replaced every two years or if it appears dark or contaminated, as moisture absorption can lead to brake fluid freeze-up in cold conditions. Additionally, verify that the service history includes scheduled fluid changes and component replacements, such as brake pads, filters, and spark plugs, to ensure the vehicle has been maintained according to BMW’s recommended intervals.