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      01-29-2013, 03:50 AM   #3
Quasimodem's Avatar

Drives: 335d
Join Date: Oct 2008
Location: California

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2009 335d US  [0.00]
Maybe the stereo installation caused a drain and yes the battery may be dead. Well, that's my bet anyway.

I have a 4/2009 build 335d and the battery is still good. But I live in California, so YMMV because colder climates may be harder on batteries.

I do not have CA either, maybe that drains batteries too.

Anyway, take it to a shop that knows BMWs to check the battery because if they do end up replacing it they need to register the new battery with the car or it might blow up.
Speakers: CDT Audio HD-42 comps--front doors (RAAMmat deadened), CDT ES-06 6.5" woofers--kickpanl Pods, Hertz EBX202R dual 8" ported trunk sub. Amps: Phoenix Gold RSd 500.4 (comps & pods). PG RSd 600.1 (sub). Power & Ground: 4AWG Streetwires w/RockFosgt RFDB1 distro blocks. Input: HU lineout--Kicker KISL RCA adapters--RockFosgt RFIT-6 cables--Audiocontrol Matrix--Monster cables--RSd 500.4--lineout Monstr Cabl to RSd 600.1.