[PREMIUM PERFORMANCE] - Bosch Wheel Speed Sensors provide vital information, critical for the proper function of ABS (Anti-lock Braking Systems), TCS (Traction Control System), ESP (Electronic Stabilization Program) and Navigation systems [EXPERIENCE YOU CAN TRUST] - Not only did Bosch invent the Electronic Stabilization Program (ESP) – the technology that improves a vehicle’s stability – but it also was the first company to fit Anti-locking Braking Systems (ABS) into mass production [OPTIMUM SAFETY] - Bosch Wheel Speed Sensors feature OE or better quality, performance, and function to ensure your vehicle performs with optimum levels of safety [PRECISION SENSING] - Bosch Wheel Speed Sensors report a vehicle's exact speed, forward and backward movement, and wheel stoppage to ABS, Traction Control, and Stability systems [EXACT OE FIT] - Bosch Wheel Speed Sensors feature correct harnesses (where applicable), OE style connectors, and precision attachment points, for a perfect fit that ensures a hassle-free installation process REAR LEFT or RIGHT: Compatible with select vehicles (Note: option packages/trim level may affect fitment - verify specific vehicle fitment details with fit checker above): BMW: 1997-98 528i, 1997-98 540i