Looking for replacement height control modules and liftgate module. My trunk flooded and they are screwed. I’m also well out of the warranty period and the law suit criteria

 

I saved a set by spraying the PCB thoroughly with WD-40 to remove the corrosion, then proceeded to brush with an old toobrush any remaining traces.

In case it doesnt work, you can pickup up the HKL module from an E61, E65 and even some RR models. See part compatibility : RealOEM.com - Part Search

The EHC module is the same as a facelift E65 but it is hard to find used in good condition. See part compatibility : RealOEM.com - Part Search