The battery is located in the trunk to the right side. There is a large caperted panel that covers access to the brake light assembly, the fuse block, and the battery. you'll need a flat head screw driver to remove the plastic retainer clips. Raise the spare tire cover and hold it up as you pull the carpeted panel away from the body. (takes a little effort) once exposed you'll need a 13mm socket to remove the bracket which goes the length of the battery and a 10mm socket to remove the battery hold down bracket and to loosen the battery terminals.
in the trunk
under back seat
under the back seat
think in trunk
how do i remove and replace my fog lamp bulbs on my 2006 bmw 525i
ask that @ a BMW shop i had the same prod with mine
in trunk, right side of rear panel.
Behind the right-side hatch in the trunk compartment.
right side of the trunk
where is the horn fuse for BMW 525i
where is the starter locate on a 2007 525i BMW
on a 2002 it in the trunck where the battery is located on the right hand side