Hella 012039691 ABS Wheel Speed Sensor - Front Left

ABS Wheel Speed Sensor Overview

This HELLA ABS wheel speed sensor is a standard replacement part built for accurate wheel speed detection and reliable ABS operation. It is a fitment-based solution for select BMW applications, including BMW Z4, BMW 325Ci, and BMW 330i models with front left placement.

Key Features

• Hall sensor design for precise wheel speed monitoring.
• Includes a wiring harness for a direct service replacement.
• Round blue connector with 2-pin female terminal design.
• 18.43 in. wiring harness length for the specified application.
• Genuine OE from HELLA for select BMW braking systems.

Detailed Description

Part number 012039691 is an ABS wheel speed sensor engineered to monitor wheel movement and support stable braking performance. The Hall sensor design, 12 VDC specification, and durable construction are intended to deliver consistent signal output under demanding road conditions. This HELLA sensor is listed for front left applications on select BMW 325Ci, BMW 330Ci, BMW M3, BMW 325i, BMW 330i, and BMW Z4 models, with fitment notes that include the ABS wheel speed sensor wire harness on many applications. If you are replacing a worn or faulty sensor on a BMW Z4, BMW 325Ci, or BMW 330i, this part number 012039691 provides a direct service option for the specified vehicles.

Common Problems This Part Can Address

• ABS warning light caused by an inaccurate wheel speed signal.
• Loss of braking stability control input from a failed sensor.
• Intermittent ABS operation due to damaged sensor wiring.
• Fault codes related to wheel speed detection at the front axle.
• Signal dropouts from a worn or contaminated sensor assembly.

Installation Notes and Tips

Fitment is specific to the listed BMW applications and front left position. The product includes a wiring harness, and the notes indicate that qualified personnel are required for assembly/disassembly. Verify connector style, harness routing, and mounting location before installation. Part number 012039691 should be matched to the vehicle application and position exactly as listed.

Quality Assurance

Genuine OE from HELLA, this sensor is built with durable materials and precision engineering for dependable ABS signal performance. Part number 012039691 cross-references Delphi SS20041 for the same application.