Sensor Gap

1. Measure the distance "A" between ABS wheel speed sensor surface and sensor pole face.
   Fig 1: Identifying Sensor Gap

   Courtesy of SUBARU OF AMERICA, INC.
2. Measure the distance "B" between surface where the front axle housing meets the ABS wheel speed sensor, and the tone wheel.
   NOTE: Measure so that the gauge touches the tone wheel teeth top.
   Fig 2: Measuring Tone Wheel Teeth Gap

   Courtesy of SUBARU OF AMERICA, INC.
3. Find the gap between the ABS wheel speed sensor pole face and the surface of the tone wheel teeth by putting the measured values in the formula below and calculating.

ABS wheel speed sensor clearance = B - A 

ABS wheel speed sensor standard clearance: 

0.3 - 0.8 mm (0.012 - 0.031 in)