I also need to replace my battery but i cant decide wether to register it or not. according to this post we dont need to register it, http://www.justanswer.com/bmw/4qd9b-...2007-335i.html
. Does anyone know where to buy an oem battery by any chance? most online sites dont ship it because it hazardous. After you check out they will send you a cancellation of transaction within 5 mins.