Wheel speed sensors are often called ABS sensors. You'll find them mounted on the axles of all ABS equipped vehicles on your wheel hubs, near the brake rotors./The ABS sensor is a vital part of the braking system. Without a working ABS wheel speed sensor, the ABS system will fail to work properly. Resulting in a ABS Light on your Dash and loss of your Antilock Brake System. Fit 05-06 Lexus GS300/07-11 Lexus GS350/05-07 Lexus GS430/07-11 Lexus GS450H/08-11 Lexus GS460/08-14 Lexus IS F/06-13 Lexus IS250/06-13 Lexus IS350/2012 Lexus LFA/07-14 Lexus LS460/08-14 Lexus LS600H