When coasting, decelerating or braking the the alternator is coupled and the battery charged. You will see the blue line going towards the battery when this is occurring. There is a BC panel that shows it along with the MPG for the selected trip data bucket. Attached Images. __________________. To install the permanent harness do the following: The battery is located in the trunk on the passenger side, under a cover where the car's manual should be. It is the cover that holds the tool set as well. To remove the battery cover, there is a turn screw head up in the side of the trunk that is part of the cover. In this this video, I'll show you just how to charge your BMW battery using the CTEK 4.3! Come see!How To Replace/Register Your BMW Battery! DIY! 👉🏻 https: 2. Remove the battery bracket holder, located on the negative side of the battery, using the socket wrench and fitting. 3. Take the new BMW battery and connect the negative end of jumper cable from the negative post of the new battery to the negative end of the battery ground (preferably on the nut bolted onto the chassis). 4. Where is the battery on a 2009 BMW 3 Series? The battery in your 2007-2013 BMW 3 series is located in the trunk on the right side of the vehicle. It is easily accessed by removing the right trim panel. Spread the love. The battery is located in the trunk on the passenger side, under a cover where the car’s manual should be. It is the cover that holds the tool set as well. To remove the battery cover, there is a turn screw head up in the side of the trunk that is part of the cover. Table of Contents show. Fuse box diagram (location and assignment of electrical fuses and relays) for BMW 3-Series E46 (316i, 318i, 318d, 320i, 320d, 323i, 325i, 328i, 330i, 330d). The latest models have the battery located in the boot or trunk as opposed to other types of automobiles. These batteries are usually in the boot compartment on the right-hand side. The location helps prevent the engine from damaging the car battery in the long run. Many first-time BMW owners find it a challenge to locate the battery. OTdiuTf.