The Brembo/Tesla EPB calipers have motors in them that function like power window motors. They engage slowly (2 or 3 seconds) and once engaged, they stay in that position until they are powered in reverse. That way, if your battery goes dead, your parking brake doesn't release. Pantera Electronics has a few different styles of EPB switches as well as mounting brackets and the other parts you may need to perform the installation.
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