BMW X5 rear suspension pump failure after air bag replacement on BMW X5

Some BMW X5 owners report experiencing rear suspension pump failure after replacing air bags, which can manifest as the vehicle dropping overnight due to various issues such as air leaks, valve block problems, or damaged air lines. Even with new suspension air pumps and rear air bags installed, some owners notice their vehicle leaning or sagging on one side after parking, suggesting possible problems with the replacement parts or installation. In cases where both sides of the rear suspension bottom out, it may indicate an issue with the air pump itself, necessitating disassembly for diagnosis. Previous checks for leaks have led some owners to suspect that the solenoid valve is not the problem, pointing to other underlying issues within the air suspension system. Additionally, loading the back of the vehicle may lead to sagging that takes an extended period to restore, potentially due to a sticking vent valve on the compressor. It is also reported that proper installation is critical, including bleeding the system and transferring necessary components, to ensure the rear suspension system functions correctly.