This DELPHI wheel speed sensor, part code SS21317-12B1, is designed to provide precise rotational speed information for each wheel. This data is crucial for the proper functioning of your vehicle's Anti-lock Braking System (ABS), Electronic Stability Control (ESC), and traction control systems. A functioning speed sensor also ensures accurate speedometer readings and contributes to overall vehicle safety and performance. Manufactured by DELPHI, a trusted name in automotive components, this sensor is built to meet stringent quality standards for durability and reliability.