BMW G11 G12 G30 Rear Wheel ABS Speed Sensor 6859584

BMW G11, G12, G30 Rear Wheel ABS Speed Sensor is an original safety system component responsible for precise wheel rotational speed reading and the proper functioning of the ABS and stability control systems. This used, factory BMW component ensures correct integration with the vehicle's electronics, leading to predictable braking system performance and driving comfort. It's a practical solution for drivers seeking a proven part with preserved factory fitment.

Specifications and technical data

• SKU: 6859584
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6859584
• Substitutable numbers: 6859584, 34526859584
• Location on the vehicle: Rear
• Category: ABS Speed Sensors

Purpose and Function in the ABS System

This element belongs to the ABS Speed Sensor category and is designed for installation on the rear axle of BMW G11, G12, and G30 series vehicles. It generates the wheel's rotational speed signal, which is then analyzed by the braking system controller. Based on this data, the ABS system can limit wheel slip during braking, and stability control systems assist the driver in emergency situations.

Its placement on the rear axle allows for proper control of the rear wheels, which is crucial for both braking effectiveness and vehicle stability during load changes and at higher speeds.

Benefits of Using an Original BMW Sensor

Using an original ABS speed sensor in BMW G11, G12, and G30 series vehicles ensures:

• factory fitment for the electrical system and wheel hub mounts,
• proper cooperation with the ABS/ESP control module,
• a stable measurement signal, reducing the risk of errors and warning lights on the dashboard,
• braking system performance characteristics consistent with the manufacturer's specifications.

For the user, this means reliable operation of active safety systems and a reduced risk of incorrect ABS or traction control function after part replacement.

Condition, Installation, and Operation

The offered sensor is a used component, sourced from disassembly, allowing for a favorable purchase price while maintaining original BMW specifications. Before installation, a standard check of the connector, wiring harness, and wheel hub socket is recommended to ensure proper electrical contact and mechanical stability.

In practice, replacing a rear axle ABS speed sensor typically involves:

• removing the old component from the hub or steering knuckle,
• cleaning the mounting socket of dirt and corrosion,
• correctly routing the cable in the factory clips,
• connecting the plug to the vehicle's wiring.

This approach minimizes the risk of mechanical damage and signal interference during further operation.

Integration with the Drivetrain and Diagnostics

A functional ABS speed sensor is important not only for braking but also for the operation of systems responsible for torque distribution and vehicle stability. Incorrect signals can lead to errors in the control unit, illuminated ABS/ESP warning lights, and limitations in driver assistance systems. Therefore, when diagnosing the drivetrain and rear axle, the condition of the speed sensors should be considered.

To better understand the relationships between the differential, speed sensors, and drivetrain, and to learn how to assess the condition of used components, consult the guide: Used Differentials – What You Should Know About Second-Hand Differentials, Sensors, and Drivetrains.

Expanding the ABS System in BMW

If you are planning a comprehensive repair or upgrade of the braking area 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 Sensors.

When choosing between new and used ABS and drivetrain components, comparing the costs and durability of different solutions can be helpful – you'll find more practical tips in the article New or Used? Comparing the Cost and Quality of Car Parts.