E90 BMW 328i Interior Door Handle Replacement

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Place the door panel on a chair next to the car to prop it up. Make sure to not to disconnect any wires.
Wiring may disconnect from the door; take pictures of where the wires are located to keep track of their connections.
Use a 5/16 inch drill bit to drill four holes directly through the entire panel.
A 5/16 inch drill bit is ideal, but a 1/4 inch will also work.

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