Delphi SS21261 ABS Wheel Speed Sensor - Rear Left

Delphi Rear Left ABS Wheel Speed Sensor SS21261

Delphi SS21261 is a rear left ABS wheel speed sensor built for accurate wheel-speed input and reliable brake system communication. It is a direct-fit replacement for select Buick Encore and Chevrolet Trax applications, with OE-standard testing and calibration to help maintain consistent signal quality.

Key Features

• ABS wheel speed sensor for the rear left position
• 1 female square connector with 2 male terminals
• Blade terminal type with included wiring harness
• Package includes the ABS wheel speed sensor and instruction sheet
• OE-developed and validated to support accurate readings
• Cross-references Standard Ignition ALS3145 for the same application

Product Details

Delphi SS21261 is engineered for vehicles that rely on precise rear wheel speed data for ABS operation and related stability functions. The sensor is calibrated to OE standards and validated through Delphi’s product development process, helping maintain dependable signal output in service. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. It is a strong match for drivers and technicians servicing a Buick Encore or Chevrolet Trax with a rear left sensor replacement need.

Vehicle Fitment

• Fits 2013-2021 Buick Encore, rear left.
• Fits 2015-2021 Chevrolet Trax, rear left.

Common Problems This Part Can Address

• ABS warning light triggered by a failed rear wheel speed sensor
• Erratic or missing wheel speed signal at the rear left wheel
• Traction control or stability system fault codes related to wheel speed input
• Brake system communication issues caused by sensor signal loss
• Intermittent ABS operation on Buick Encore and Chevrolet Trax models

Installation Notes and Tips

Confirm the rear left position before installation and compare the connector, terminal count, and mounting style to the original sensor. Inspect the harness routing and connector condition during replacement, and clear any stored ABS codes after installation. For 2013-2021 Buick Encore and 2015-2021 Chevrolet Trax applications, verify the sensor seating and wiring path to avoid signal interruption.

Quality Assurance

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