Delphi SS21478 ABS Wheel Speed Sensor - Front

Delphi Front ABS Wheel Speed Sensor SS21478

The Delphi SS21478 is a front ABS wheel speed sensor built for accurate wheel speed input on select Chevrolet and Buick applications. It uses OE-calibrated testing standards and includes a wiring harness for a direct replacement-style repair.

Key Features

• Front ABS wheel speed sensor for brake and stability system input
• Standard replacement grade
• 1055 mm wiring harness included
• 1 black square connector with 2 male blade terminals
• Package includes ABS wheel speed sensor and instruction sheet
• Delphi part number SS21478

Product Details

Delphi SS21478 is part of the brand’s sensor lineup, which is validated to OE standards for accurate signal output and consistent performance. This front ABS wheel speed sensor is built with a square black connector, male connector and terminal ends, and a 1055 mm harness length for the listed applications. It is a standard replacement part for vehicles that need a front wheel speed signal restored, including Chevrolet Malibu and Buick LaCrosse, Regal Sportback, and Regal TourX models.

This part cross-references Standard Ignition ALS2865 for the same application.

Vehicle Fitment

• Fits 2017-2020 Chevrolet Malibu, front
• Fits 2019 Buick LaCrosse, front
• Fits 2018-2019 Buick Regal Sportback, front
• Fits 2018-2019 Buick Regal TourX, front

Common Issues This Part May Address

• ABS warning light illuminated
• Wheel speed signal loss at the front axle
• Traction control or stability control fault codes related to wheel speed input
• Erratic or inconsistent ABS sensor readings
• Brake system warning messages tied to front sensor failure

Installation Notes

Confirm connector style, harness length, and front position before installation. Inspect the tone ring, wiring path, and mounting area for damage or corrosion, and clear diagnostic trouble codes after replacement. Follow the included instruction sheet and verify proper sensor routing to avoid harness strain.

Quality Assurance

Delphi sensors are tested and calibrated to OE standards to help deliver accurate readings and reduce repeat repairs. The SS21478 is backed by Delphi’s OE-focused sensor development and validation process.