ABS DSC Pump BMW E81 E87 E90 LCI Hydro Unit Braking Module 6789300 6789301

Visual condition of the part 

The product shows signs of use visible in the photos. 

ABS DSC Pump BMW E81 E87 E90 LCI Hydro Unit Braking Module is an original component from the ABS and ESP System group, designed to work with the factory electronic stability control system in BMW 1 and 3 Series vehicles. By maintaining the manufacturer's specifications, it ensures consistent performance of the braking, traction control, and stability systems, which translates into predictable vehicle behavior in emergency situations.

Specifications and technical data

• SKU: 6789301-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6789301
• Substitutable numbers: 34516863354, 6863354, 34516789300, 6789300, 34516789301, 6789301, 34516788520, 6788520, 34516795171, 6795171, 34516789306, 6789306
• Category: Other Brake Parts

Purpose and function in the vehicle

The described pump is the central hydraulic-electronic component responsible for regulating pressure in the brake circuits during the operation of ABS and DSC systems. In practice, this means precise control of braking force on individual wheels, slip limitation, and stability control during critical maneuvers, such as emergency braking on slippery surfaces or obstacle avoidance.

In BMW E81, E87 LCI, and E90 series vehicles, the use of a dedicated ABS DSC Pump allows for maintaining the factory operating characteristics of the system without the need for adapting aftermarket solutions. This is particularly important in vehicles equipped with advanced electronics monitoring driving dynamics.

Benefits of using an original ABS DSC Pump

Using an original component from the ABS and ESP System group instead of a damaged module brings a number of practical benefits:

• maintaining compatibility with the vehicle's factory electronic architecture,
• proper cooperation with wheel speed sensors and control modules,
• stable operation of ABS, traction control, and stability systems,
• reducing the risk of controller errors resulting from improper part selection.

For workshops and users, this means easier diagnostics, a predictable installation process, and a lower risk of needing further intervention in the braking system after replacement.

Product characteristics and vehicle selection

The ABS DSC Pump intended for BMW E81, E87 LCI, and E90 series is a component that should be selected taking into account the manufacturer's markings and the configuration of the specific vehicle. In practice, this means verifying compatibility with the OEM part number and the availability of appropriate interchangeable numbers, which facilitates matching the module to the specific model year, engine version, and equipment.

The product has assigned reference numbers that allow for unambiguous identification in BMW catalogs and parts selection systems. Thanks to this, both the mechanic and the user can precisely check compatibility before installation, minimizing the risk of purchasing an unsuitable component.

Condition, origin, and economic aspect

The offered ABS DSC Pump is a used component, sourced from dismantling, which constitutes an attractive cost alternative to purchasing a new module. By following appropriate diagnostic and installation procedures, it allows for significantly reducing the cost of braking system repairs while maintaining the original manufacturer's specifications.

For users looking for a substantive approach to the topic of regeneration and replacement of brake components, an article discussing the selection of verified recycled parts will be useful – more information can be found in the material: Brake calipers under the microscope: how to reduce repair costs of the braking system by choosing verified recycled parts.

Integration with the BMW ABS and ESP system

In BMW vehicles, the ABS DSC pump module works with a series of sensors and controllers responsible for analyzing wheel rotational speed, lateral and longitudinal acceleration, and steering angle. A correctly selected and functional component allows for:

• effective prevention of wheel lock-up during braking,
• control of drive wheel slip during acceleration,
• stability control in situations of sudden direction changes,
• maintaining predictable vehicle behavior in driving modes provided by the manufacturer.

Thanks to this, the driver receives consistent operation of all active safety functions, and the braking system maintains parameters close to factory standards.

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 pressure sensors, check the available parts in the ABS and ESP System BMW category.