How to Replace the ABS Sensor on a Subaru Outback
Anti-lock Brake Systems, or ABS, are available on a variety of Subaru vehicles and provide a degree of safety that does not always come standard on other cars. The ABS sensor is a device on each wheel that measures the speed at which the wheel is turning. If the wheel is not turning as fast as the other wheels then the computer adjusts braking to keep all wheels turning and slowing at the same speed. Sometimes these sensors will break and need replacement. Learning to replace these sensors will save you a lot of money. Replacing an ABS sensor is fairly easy and can be accomplished by any home mechanic.
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Instructions
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1
Park the car on level ground and set the parking brake. Pop the hood and disconnect the battery cables with a socket wrench.
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2
Jack up one side of the car and use the lug nut wrench to remove one wheel. Reach in behind the wheel column and locate a small black box. Use a socket wrench to remove the mounting screws on the edges of the box. Slide it around to look at the underside of the box.
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3
Pull the tabs on either side of the small round connector (the speed sensor) and disconnect the wiring harness underneath. Pull the ABS sensor free and replace it with a new sensor.
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4
Reattach the box and mounting screws to the back of the column and replace the wheel. Repeat Steps 1 through 3 on the remaining wheels that have bad ABS sensors and then take the car for a test drive to make sure the sensors are working.
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Tips & Warnings
Replace bad ABS sensors as soon as possible, as malfunctioning sensors could cause an accident.
