Fits: 1996-2002 For Toyota 4Runner 1998-2000 For Toyota Tacoma WHAT IS AN ABS SENSOR ? The anti-lock braking system uses an ABS sensor or wheel sensor to monitor the wheel speed and send this information to the ABS computer. The ABS computer uses this information to prevent the brakes from locking during an emergency stop. If wheel speeds are not equal, the computer modulates the anti-lock feature until the speeds are equalized. .
