Delphi SS21328 ABS Wheel Speed Sensor - Rear Left

Delphi ABS Wheel Speed Sensor SS21328

Delphi SS21328 is a rear left ABS wheel speed sensor built for accurate wheel speed input and reliable anti-lock brake system operation. It is a direct-fit service part for select Buick LaCrosse and Buick Regal applications, with OE-style calibration and a vehicle-specific wiring harness for cleaner replacement.

Key Features

• ABS wheel speed sensor for rear left position
• OE-standard testing and calibration for accurate readings
• Black connector with square connector shape
• Male connector and male terminal design
• Wiring harness included for the listed application
• Package contents: ABS wheel speed sensor and instruction sheet
• Delphi part number SS21328

Detailed Description

Delphi SS21328 is engineered for vehicles that rely on precise wheel speed data to support ABS performance and brake system monitoring. The sensor uses a 1,445 mm wiring harness, a single connector, and a 2-terminal configuration to match the specified rear left installation point. Delphi validates these sensors to OE standards, helping ensure consistent signal output and dependable service on the road. This part cross-references Standard Ignition ALS3439 for the same application.

Compatible with 2012-2016 Buick LaCrosse, rear left, and 2014-2016 Buick Regal, rear left. If you are replacing a failing rear wheel speed sensor on a Buick LaCrosse or Buick Regal, Delphi SS21328 provides the correct fitment and connector layout for the listed vehicles.

What It Helps Solve

• ABS warning light caused by a faulty rear wheel speed sensor
• Erratic or missing wheel speed signal at the rear left wheel
• Brake system fault codes related to wheel speed input
• Loss of anti-lock brake function from sensor signal failure
• Intermittent drivability or traction control concerns tied to wheel speed data

Installation Notes and Tips

Verify the rear left position, connector style, and harness length before installation. Inspect the tone ring, hub area, and wiring path for damage or corrosion that could affect sensor performance. Clear diagnostic trouble codes after installation and confirm proper ABS operation during a road test.

Quality Assurance

Delphi backs this sensor with OE development and product validation methods, and each unit is tested and calibrated to OE standards for accurate readings and reduced comebacks.