Standard Ignition ALS3479 ABS Wheel Speed Sensor - Rear

Rear ABS Wheel Speed Sensor for Mercedes-Benz

Standard Ignition ALS3479 is a rear ABS wheel speed sensor for select Mercedes-Benz compact models. It uses a 2-terminal, blade-style electrical connection with a single rectangular female connector and bolt-mount installation at the wheel.

Fits 2019-2025 Mercedes-Benz A220, rear; Fits 2020-2022 Mercedes-Benz A35 AMG, rear; Fits 2020-2025 Mercedes-Benz CLA250, rear; Fits 2020-2023 Mercedes-Benz CLA45 AMG, rear; Fits 2020-2025 Mercedes-Benz GLB250, rear; Fits 2021-2025 Mercedes-Benz GLA250, rear; Fits 2021-2025 Mercedes-Benz GLA35 AMG, rear; Fits 2021-2023 Mercedes-Benz GLA45 AMG, rear; Fits 2021-2025 Mercedes-Benz GLB35 AMG, rear; Fits 2022-2025 Mercedes-Benz EQB 300, rear; Fits 2022-2025 Mercedes-Benz EQB 350, rear; Fits 2023-2025 Mercedes-Benz EQB 250+, rear; Fits 2024-2025 Mercedes-Benz CLA45 AMG S, rear.

• Brand: Standard Ignition
• Part number: ALS3479
• Rear wheel mounting location
• Bolt-mount design with 1 bolt hole
• 1 rectangular female connector
• 2 terminals, male blade terminal type
• No wiring harness included
• No dust shield included
• No mounting hardware included

Detailed Product Overview

Standard Ignition ALS3479 is built for rear wheel speed signal monitoring on Mercedes-Benz A-Class, CLA, GLA, GLB, and EQB applications. As an ABS wheel speed sensor, it reads wheel rotation data used by the braking system and related stability functions. If you are replacing a rear Mercedes-Benz ABS sensor, ALS3479 matches the listed wheel-side mounting style and connector layout for direct service on the confirmed applications.

This part cross-references 533867 and ABSA141 for the same application. The ALS3479 part number is also listed under interchange references 2479050100 and ABS3479.

Common Issues This Sensor Can Address

• ABS warning light illuminated on the dash
• Traction control or stability control fault messages
• Intermittent or inaccurate wheel speed signal readings
• Brake system fault codes related to the rear wheel sensor circuit
• Loss of ABS function caused by a failed rear sensor

Installation Notes and Tips

Confirm the rear wheel position, connector shape, and terminal count before installation. This sensor uses a bolt-mount design and does not include a wiring harness, dust shield, or mounting hardware, so reuse or source the required vehicle-side components as needed. Inspect the wheel hub area and connector for corrosion, damaged wiring, or debris before fitting the new sensor.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and sensor components. ALS3479 is cataloged for the listed Mercedes-Benz rear applications and built to match the specified connector and mounting configuration.