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      06-20-2021, 11:04 PM   #2
430Scud
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Drives: M550iX,430 Scud,E39 540Msport
Join Date: Mar 2020
Location: Seattle, WA

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Start with sunroof drain...there is one at the forward corning, left and right side with sunroof open. Run some water in the channel to see if it flows through and out the under end of tube under car. They can get clogged, and sometimes the tube gets detached from the sunroof cassette. If you find water leaking around the A pillar or headliner you will need to pull down that corner of the headliner. Youtube has videos how to do this. You may not need pull the entire headliner , just the front left corner. Remove the handle grab rail, and all sunvisor mounts and the A pillar. Not hard, just take your time, watch all the available videos on youtube and it will work out. I just did this to fix my leak.