I'm baffled on this one. I replaced the tail light seal yesterday. pretty sure that wasn't the issue. poured a gallon of water directly on the bump stop apparatus. ZERO leakage. I poured water on the sunroof and all down the rear hatch channel. nothing. window seals. nothing.

I pulled out the carpet piece and neatly laid some paper towels in the area that's getting wet. i'm going to wash it today and see if I can get it wet at all i'll hit it hard with the hose with RINSE selected on the sprayer and hit all the seams, tail lights etc and report back.

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2005 X5 3.0i - 71k mi (9.2018) -> 81k (9.19) -> 100k 9.21 -> 123k (8.25)
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SOLD : ( 2003 X5 3.0 - 177k mi (9.2018) -> 186k (9.19) -> 205k (9.21)
SOLD : ( 1997 328is Coupe - Hellrot Red
SOLD : ( 1988 528e w/ Bullseye s256 / MS2 Extra / GC Coilovers / Yukon Coils ~ 300+ HP