ABS DSC Module BMW E81 E87 E90 Pump ECU Hydro Unit 6789300 6784764

ABS DSC Module BMW E81 E87 E90 Pump ECU Hydro Unit is a complete solution designed for the electronic stability control and anti-lock braking system in BMW vehicles. This component belongs to the ABS Controllers group and is a factory-fitted electronic-hydraulic module that integrates brake circuit pressure control with traction control and vehicle stability functions.

Specifications and technical data

• SKU: 6784764-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6784764
• Substitutable numbers: 34506784809, 34516784763, 34526784764, 6784809, 6784763, 6784764, 34512460463, 2460463
• Category: ABS Control Modules

Purpose and function in the BMW braking system

The presented ABS DSC Module BMW E81 E87 E90 Pump ECU Hydro Unit is a central element of the active safety system in selected BMW 1 Series (E81, E87) and 3 Series (E90) models. It combines a hydraulic block with a pump and an ECU controller in one housing, responsible for precise braking pressure distribution to individual wheels, as well as the implementation of the DSC stability control function.

Thanks to the integrated control electronics, the module works with wheel speed sensors, lateral and longitudinal acceleration sensors, and the steering angle sensor, enabling dynamic braking force correction. In practice, this translates into stable vehicle behavior during emergency braking, obstacle avoidance maneuvers, and driving on surfaces with varying grip levels.

Construction of the ABS DSC Module – hydraulic-electronic unit

The module consists of a hydraulic part with a pump and an integrated electronic ECU controller. This design reduces the number of connections in the system, facilitates installation and maintenance, and ensures consistent operation of all ABS and DSC functions. Using an original BMW solution allows for full compatibility with the factory electrical installation and vehicle software.

Within the ABS Controllers category, this type of module is distinguished by its tight integration with the stability control system, which is important for diagnostics and coding. A properly selected controller enables correct cooperation with existing sensors and the vehicle's central unit, minimizing the risk of communication errors in the CAN bus.

Selection, compatibility, and replacement numbers

The offered component has a dedicated OEM part number and a set of interchangeable numbers, which facilitates precise matching to the specific configuration of a BMW E81, E87, or E90. When selecting the module, it is worth paying attention to compatibility with the body version, brake system type, and vehicle equipment with the DSC system to avoid coding and adaptation issues.

The presence of reference numbers allows for the safe replacement of a damaged module with another compatible unit from the same family of controllers. This allows for effectively restoring the full functionality of the ABS/DSC system without the need for expensive purchases of new components from an authorized service center, while maintaining operating parameters consistent with factory specifications.

Condition, origin, and advantages of using a used module

The module comes from dismantling and is offered as a used original BMW component. Such parts are frequently chosen by workshops and individual users as a reasonable compromise between repair costs and maintaining factory build quality. Using an original controller from the same production line reduces the risk of compatibility issues that may occur with aftermarket replacements that do not have full support for DSC functions.

Replacing a damaged ABS DSC Module BMW E81 E87 E90 Pump ECU Hydro Unit with a functional used unit allows for restoring the proper operation of safety systems, reducing error messages on the dashboard, and regaining full emergency braking and stability control effectiveness. This is a practical solution for both daily-driven cars and fleet vehicles, where service economy is a priority.

Technical support and additional information

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 pumps, control modules, or hydraulic blocks, check the available parts in the BMW ABS Controllers category.

When choosing a used ABS DSC module, it is worth familiarizing yourself with practical tips regarding automotive electronics from dismantling – issues of selection, coding, and compatibility verification are discussed in more detail in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. This will make it easier to plan the repair and avoid common installation errors.