2 ways : 1-Take out the back seat by lifting front edge of seat exposing the battery. 2- There is one positive cable post under the hood on drivers side near the fuse box. Place positive connector on it and ground the negative on engine chassis. I would recommend the 1st way going directly to battery post!
in the trunk
under the back seat
under back seat
think in trunk
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.
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In a 2001 BMW 525i, the battery is located in the trunk, not under the hood. It is positioned on the right side of the trunk area, beneath a cover. Accessing the battery requires removing the cover to reach the terminals for maintenance or replacement.
on a 2002 it in the trunck where the battery is located on the right hand side
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