Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE
Check With SUBARU Select Monitor
- Using Subaru Select Monitor, select [FR Wheel Speed] and [FL Wheel Speed] from the list of Data Monitor items. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR .
- Check if the speed indicated on the display changes in the same manner as the speedometer reading during acceleration/deceleration when the steering wheel is in the straight-ahead position.
- If the inspection result shows that the value for either side alone does not change on the display screen, swap the sensor sub assembly front between LH and RH and then check again to see if the value changes or not.NOTE: Using a tape or the like, mark the one on which the value did not change.
- If the inspection result shows that the value does not change on the sensor marked: Replace the relevant sensor sub assembly front.
- If the inspection result shows that the value does not change on the sensor not marked: Place the sensor sub assembly front that is not marked to the original position, and perform unit inspection on the sensor sub assembly front that is marked. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>Front ABS Wheel Speed Sensor>INSPECTION>CHECK ABS WHEEL SPEED SENSOR UNIT .
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.