BMW F20 F21 F30 F31 DXC Pulse Generator Sensor Front Axle N47N 6791748

BMW F20 F21 F30 F31 DXC Pulse Generator Sensor Front Axle is a component from the ABS speed sensor group, designed for operation on the vehicle's front axle. It is responsible for the precise reading of wheel rotational speed, which is crucial for the proper functioning of the ABS system, electronic stability control systems, and advanced safety features. Using an original BMW component is a sensible choice for drivers who want to maintain the factory performance characteristics of the braking system while keeping repair costs under control.

Specifications and technical data

• SKU: 6791748
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6791748
• Substitutable numbers: 34526791748, 6791748
• Location on the vehicle: Front
• Category: ABS Speed Sensors

Function and application of the ABS speed sensor

The described pulse sensor is mounted in the front axle area and works in conjunction with the wheel pulse ring. Based on the generated signals, the brake system controller calculates the rotational speed, enabling:

• precise modulation of braking force by the ABS system,
• stability control in emergency situations,
• cooperation with traction control systems,
• proper operation of driver assistance functions that depend on wheel rotational speed.

Thanks to its perfect fit for the BMW F-series platform, the sensor ensures signal consistency with the vehicle's factory electronics and stable braking system operation.

Construction and technical characteristics

The DXC pulse sensor utilizes the principle of non-contact rotational speed measurement, which reduces component wear and allows for long-term, repeatable operation. The design provides for installation in the front part of the vehicle, with the possibility of use on either the left or right side, which facilitates service and part selection in the case of paired replacement.

This type of solution is characterized by:

• a compact housing adapted for operation in road conditions (moisture, dirt, temperature changes),
• precise positioning relative to the pulse ring,
• an electrical connector designed specifically for BMW, ensuring a reliable signal contact.

A sensor configured in this way allows for stable reading parameters, which translates into predictable ABS system performance during daily use.

Benefits of using an original BMW sensor

Using an original speed sensor in BMW F-series cars brings a number of practical service and usage benefits. The most important include:

• Factory fit – mounting geometry and signal characteristics are in accordance with the vehicle manufacturer's requirements.
• Consistency with electronics – the ABS/ESP controller receives a signal with parameters intended for the specific model, which reduces the risk of errors and warning messages.
• Stable braking system operation – correct wheel speed reading affects braking efficiency and vehicle behavior in emergency situations.
• Cost optimization – choosing a used, original component allows for balancing budget control with maintaining proper system operating parameters.

For workshops and individual users, this means a lower risk of post-installation issues and greater predictability of vehicle behavior on the road.

Condition, installation, and part selection

The offered sensor is a used component, which in workshop practice often represents a favorable compromise between cost and functionality, especially for vehicles that are used intensively. Before installation, a standard service procedure is recommended: checking the mounting socket, cleaning the contact surfaces, and verifying the wiring harness for mechanical damage.

To ensure correct selection, it is worth verifying the sensor's compatibility with the specific body version and braking system of the given BMW, using the vehicle's catalog data. A correctly selected and installed sensor allows for the restoration of full ABS system functionality without the need to interfere with other system components.

More about drivetrains and sensors

If you want to better understand how sensors work with the differential and other drivetrain components, you will find practical tips in the guide: Second-hand differential – what you need to know about used differentials, sensors, and drivetrains. This is a valuable source of knowledge when planning repairs within the drivetrain and diagnosing related sensors.

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other components from the same group, such as additional sensors, signal cables, or mounting elements, check the available parts in the category BMW ABS speed sensor.