Research has indicated this is common problem and is solved by rerouting drain line. How hard is this to do and what routing is recommended? DIY selfer task?
A/C system has gurgling water sound--can it be fixed on 1998 BMW 740i
there is a re routing process from bmw but i doubt you would want to try it unless you have access to a lift. they have relocated the drain as to limit expose that allow the drain to clog with debris