PASSAT B6 ELECTRIC PARK BRAKE
The Passat B6 park brake has rear calipers operated by an electric motor.
Pressing the EPB (Electric Park Brake) button on the dash activates the Electric Park Brake control unit.
The Electric Park Brake control activates the rear caliper motors.
The rear caliper motors apply the Park Brake.
The Rear caliper & motor assembly looks like this:
And like this in real life. (The caliper mounting bracket is not present in this picture).
The Brake Disc, Caliper, Pads, Slide pins, Piston and Seal are similar to a traditional set up.
In a traditional set up the piston would be pushed out onto the pads by a lever operated by a cable.
So the main difference is the use of an electric motor to push the Piston out.
The piston has a fixed thrust nut inside it on a threaded bar attached to the motor drive.
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