Wheel Speed Sensor BMW G30 G31 G11 G15 ABS Cable Rear Left Right N/O/S 6874638

Wheel Speed Sensor BMW G30 G31 G11 G15 ABS Cable Rear Left Right is an original BMW wheel speed sensor designed for use in the ABS system on the rear axle, on the left or right side. This component is responsible for precise reading of wheel rotational speed, which is crucial for the stable operation of the ABS and traction control systems. Thanks to its factory BMW origin, the sensor ensures proper cooperation with the vehicle's electronics and accurate mounting fit.

Specifications and technical data

• SKU: 6874638
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6874638
• Substitutable numbers: 6874638, 34526874638
• Location on the vehicle: Rear, Right, Left
• Category: Other Brake Parts

Purpose and Function in the ABS System

The wheel speed sensor mounted on the rear axle works with the pulse ring and the ABS control module, generating a signal corresponding to the wheel's rotational speed. A properly functioning component:

• supports the stable operation of the ABS system during hard braking,
• enables the correct operation of traction control and driving stability systems,
• ensures even distribution of braking force between the rear axle wheels.

Precise wheel speed reading is particularly important in modern BMW G-series models, where many safety functions rely on speed sensor data.

Rear Axle Compatibility – Left and Right Side

The presented sensor is designed for installation on the rear axle on the left or right side, which simplifies part selection during brake system service. A single part number can be used on both sides, streamlining logistics and reducing the risk of ordering errors.

This solution is beneficial for both workshops and individual users – when replacing both sensors on the rear axle, the same type of component can be used, maintaining consistency in operating parameters.

Benefits of Using an Original BMW Sensor

Using an original BMW wheel speed sensor in the ABS system offers a number of practical benefits:

• Correct Signal Characteristics – matched to the controllers used in BMW G30, G31, G11, and G15 models.
• Appropriate cable length and routing, facilitating installation in factory mounting points.
• Stable operation under typical operating conditions – with varying temperatures, humidity, and mechanical loads.

By maintaining factory parameters, the sensor supports the correct operation of safety systems without the need for adaptation or modification of the installation.

Item Condition and Service Application

The offered wheel speed sensor is a used component, making it an attractive cost-effective alternative while maintaining original BMW specifications. This type of part is suitable for:

• ABS system repairs after errors related to wheel speed reading have occurred,
• diagnostics and selective replacement of sensors on the rear axle,
• servicing vehicles where maintaining original components is required.

It is always advisable to verify the part number and its location on the vehicle before selecting the correct sensor to ensure full compatibility with the specific car configuration.

System Expansion and Related Components

If you are planning a comprehensive repair or upgrade of the braking system area in your BMW and need other parts from the same group, such as additional wheel speed sensors, signal cables, or wiring harnesses, check the available parts in the Other BMW category.

For comparison of solutions used in sports versions of other brands and a better understanding of the role of braking systems and their accompanying sensors in high-performance cars, it is worth reading the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which discusses, among other things, differences in brake and chassis construction.

If you are interested in the broader use of aftermarket components for vehicle modifications or servicing, the guide Best Used Parts for Tuning Your Car, describing a practical approach to selecting used parts, may also be helpful.