Every product is quality inspected and 100percent tested Built to quality control standards Easy installation and fine parts for easy installation New ABS speed sensor About Our Products: Anti-lock system (ABS) consists of valves, a controller, and a speed sensor, all of which work together to make sure that you can brake safely. The ABS speed sensor monitors the way in which the tires rotate and make sure that the ABS system is triggered if there is any difference or slippage between the wheels. If this sensor detects a difference, it sends a message to the controller telling it to engage the ABS and overrides your manual . part number: SSF500011(Front Right & Left ) SSF500021(Rear Right & Left ) Compatibility: For Land Range 2007-2012 Failure Symptom: ABS Light On Brake Pulsing No / Erratic Traction or Stability Control No / Erratic ABS Operation Without Pedal Contact Colour:black Material:ABS Package Contents: 2 x Front ABS wheel Speed Sensor 2 x Rear ABS wheel Speed Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.