Standard Ignition ALS3949 ABS Wheel Speed Sensor - Front

ABS Wheel Speed Sensor Overview

Standard Ignition ALS3949 is an ABS wheel speed sensor built for front axle applications on select INFINITI crossovers. It uses a direct, snap-fit attachment with a bolt-mount design and includes a wiring harness for a clean replacement path.

Key Features

• Direct, snap-fit ABS wheel speed sensor design
• Bolt-mount spindle installation
• Female connector with 2 terminals and blade terminals
• 24.5-inch harness length for routing flexibility
• Black finish with a rectangular connector shape

Detailed Description

This ABS wheel speed sensor is engineered for front position fitment on 2019-2025 INFINITI QX50 and 2022-2025 INFINITI QX55 applications. Standard Ignition ALS3949 uses a single-bolt mounting style at the spindle and a direct, snap-fit attachment method to match the original-style installation layout. The included harness and rectangular connector help support a straightforward electrical connection, while the 24.5-inch lead length provides routing reach for the application. If you are replacing a failed ABS wheel speed sensor on an INFINITI QX50 or INFINITI QX55, ALS3949 is built around the specified fitment and connector configuration.

What It Is Used For

• Restoring wheel speed signal input to the ABS system
• Addressing ABS warning lights caused by sensor failure
• Replacing damaged connector or harness sections at the spindle
• Correcting intermittent wheel speed data from a worn sensor

Installation Notes and Tips

Verify connector style, terminal count, and mounting location before installation. This sensor uses a female connector, male blade terminals, and a bolt-mount spindle attachment. No mounting hardware is listed as included, so reuse or source the required fastener as needed for the vehicle application.

Quality Assurance

Standard Ignition supplies replacement electrical and sensor components for service applications. ALS3949 cross-references 5S17375 and 479105NA0B for the same application.