Fangrui Product Details Every Product Is Quality Inspected And Tested Built To Strict Quality Control Standards Easy Installation And Fine Parts For Easy Installation Brand New Abs Speed Sensor About Our Products: Anti-lock Braking 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 Braking. Part Number: Ssf500011(front Right Left ) Ssf500021(rear Right Left ) Compatibility: For Land Rover Range Rover 2007-2012 Failure Symptom: Abs Light On Brake Pulsing No / Erratic Traction Or Stability Control No / Erratic Abs Operation Braking Without Pedal Contact Colour:black Material:abs Package Contents: 2 X Front Abs Wheel Speed Sensor 2 X Rear Abs Whee