WARNING: The door lamps (in my '11 Z4) are wired with exactly NO extra length of wiring to the lamp fixture. When you remove the fixture to access/change the bulb, the socket unplugs and the wiring is no longer accessible. I believe it was the better part of a couple hours to make a hook out of safety wire to lasso the socket and pull a few millimeters of slack to allow me to plug in the new bulb and reinstall the fixture.
I switched all my interior/trunk lamps to LED. The footwells, trunk and door lamps are the configuration shown here.
I drove to the ijdmtoy storefront in Rosemead and got good service/information/product.
http://store.ijdmtoy.com/BMW-E89-Z4-...uro_smd_18.htm