BMW E60 E61 E63 E64 LCI DSC ABS Hydro Unit Brake Pump 6784151 6774679

The BMW E60 E61 E63 E64 LCI DSC ABS Hydro Unit Brake Pump is a factory ABS/DSC hydraulic module designed for facelifted BMW 5 and 6 Series models. This original brake pump, integrated with the DSC block, ensures precise pressure control in the brake circuits and stable operation of safety systems. It's a solution for users who expect consistent brake system and traction control performance according to manufacturer specifications.

Specifications and technical data

• SKU: 6783361-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6783361
• Substitutable numbers: 34516783361, 6783361, 34516783414, 6783414, 34516780655, 6780655, 34516781969, 6781969, 34516784152, 6784152, 34526784151, 6784151, 34516774679, 6774679, BG, 6781968
• Category: Other Brake Parts

Purpose and Function in the BMW Braking System

The described ABS/DSC pump is responsible for controlling brake fluid pressure during ABS and stability control system operation. In facelifted BMW E60, E61, E63, and E64 models, this module works with wheel speed sensors, lateral and longitudinal acceleration sensors, and the DSC control unit to:

• prevent wheel lock-up during hard braking,
• stabilize the vehicle during loss of traction,
• precisely dose pressure in individual brake circuits,
• support comfort and safety functions related to the braking system.

This provides the driver with repeatable braking characteristics and predictable vehicle behavior in emergency situations.

Advantages of Using an Original DSC/ABS Module

For a critical component like the ABS/DSC hydraulic pump, maintaining compatibility with the vehicle's factory architecture is paramount. An original BMW module ensures:

• full integration with the vehicle's electrical and hydraulic systems,
• correct cooperation with the DSC control unit software,
• appropriate pressure and performance parameters for the braking system,
• stable operation of ABS, DSC, and related assistance functions.

Choosing such a solution minimizes the risk of communication errors in the vehicle's bus system and simplifies diagnostics using factory service tools. This is particularly important in BMW 5 and 6 Series cars, where precision in electronics and hydraulics directly impacts safety and driving comfort.

Condition, Verification, and Installation Aspects

This part is a used hydraulic module from a dismantled vehicle, offering an economical repair solution for the braking system while maintaining original specifications. Before installation, a standard service procedure is recommended, including:

• checking hydraulic connection seals after installation,
• bleeding the brake system according to BMW procedures,
• adaptation and potential control unit coding using appropriate diagnostic software,
• verifying ABS/DSC operation during a test drive.

A correctly selected and installed module allows for the restoration of factory brake system operating parameters without the need for a costly new unit purchase.

Fitment by Numbers and Interchangeability

The ABS/DSC pump has an assigned OEM part number and a set of interchangeable numbers, which facilitates selecting the correct module for a specific BMW E60, E61, E63, or E64 LCI configuration. Before purchasing, it's advisable to compare the markings with the existing part or the vehicle's service documentation to ensure full electrical and hydraulic compatibility. This allows for the safe use of an original module with a list of reference numbers as a replacement within the same DSC system family.

If you are considering repairing or upgrading the braking system in your BMW and need other components related to this group of parts, check the available parts in the Other BMW category.

More on Differences in Sport Braking Systems

To compare the performance characteristics of advanced braking and chassis systems in high-performance cars, you can read an analysis of the construction of RS models versus standard versions. A detailed discussion of engines, brakes, and chassis can be found in the article Audi RS vs. Other Models – What's Under the Hood and Chassis?, which helps to better understand the role of modules like the ABS/DSC pump in vehicles with increased dynamic demands.