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WABCO Wheel Speed Sensor Placement

Two Sensor & One Modulator (2S1M) Sensor Ports Facing Rear Sensor Ports Facing Forward	Four Sensor & Three Modulator (4S3M) Sensor Ports Facing Rear Sensor Ports Facing Forward
Two Sensor & Two Modulator (2S2M) Standard Valve With Side By Side Sensing Sensor Ports Facing Rear Sensor Ports Facing Forward	Four Sensor & Two Modulator (4S2M) Side By Side Sensing Sensor Ports Facing Rear Sensor Ports Facing Forward
Two Sensor & Two Modulator (2S2M) Premium Valve With Side By Side Sensing Sensor Ports Facing Rear Sensor Ports Facing Forward	Four Sensor & Two Modulator (4S2M) Axle By Axle Sensing Sensor Ports Facing Rear Sensor Ports Facing Forward

Anti-Lock Brake Data