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Old 01-12-2017, 12:34 AM   #1
GmbH
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Help! My e46 m3 battery tray in trunk fills with water after calif rain?

Hi guys!
After the recent rains my m3 parked on the driveway has rain water in the trunk just where the battery tray is. Filled a few inches? I bought the car in the summer so I don't know if it had the problem before? Has anyone ever experienced the same thing?
Thanks!
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Old 01-12-2017, 12:58 AM   #2
Sicily1918
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Quote:
Originally Posted by GmbH View Post
Hi guys!
After the recent rains my m3 parked on the driveway has rain water in the trunk just where the battery tray is. Filled a few inches? I bought the car in the summer so I don't know if it had the problem before? Has anyone ever experienced the same thing?
Thanks!
I did (although it was the tray on the other side) -- check the edge of the trunk (where the rubber seal is) for a missing plug/seal.

Also, check the taillights -- there's a cover right above them; if it's missing or broken, it'll let water in.
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Old 01-12-2017, 04:57 AM   #3
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One of my winter e46s used to collect water in the battery tray. I think Poor fitting aftermarket led tail lights was the source. Anyway a 3/16 hole drilled thru the bottom of the tray and dabbed the edges of the hole with nail polish to prevent rust - that was a few years back - forgot about it till I read your post.
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Old 01-12-2017, 09:04 AM   #4
bmwbob89
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Get in the trunk and have someone spray it with water. That is how I always found the leaks.
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Old 01-12-2017, 06:54 PM   #5
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Seal around right tail light is letting water in. Happened to my M3
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so 2004 bmw's dont come with a diff?
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