BMW OEM Part Number: 34316750643
ATE is the original parts manufacturer for the majority of BMW brake components
This master cylinder is for early model year E46 and Z4s with the Mk20 ABS unit. If your ABS unit is located on the passenger side of the car (right), then you have a Mk20 and this is the correct master cylinder.
Also easily identifiable by the additional port on the bottom of the master cylinder that leads to the pump.
Includes o-ring seal, reservoir mounting bolt, and two mounting nuts.
The pressure sensor ports come plugged, you will need to swap your sensors over from your old master cylinder
Applications: Early E46 325i/330i and Z4 non-M.