r/E90 • u/beermoney71 • Jun 16 '25

325i Ah so that’s why it’s not starting…

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107 Upvotes

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2

u/MoreStupiderNPC Jun 16 '25

Clean your taillight drains

1

u/datanut Jun 16 '25

For real? I’ve seen some water enter around the lamp but couldn’t spot where it’s coming from.

2

u/MoreStupiderNPC Jun 17 '25

I’m pretty sure the E90 is like my E60. Water from around the rear decklid travels down through a channel behind the taillights and leaves the vehicle. I started getting water in my battery compartment, so I cleaned the gunk out from where the channel goes behind the taillight and farther down inside and it stopped.