ABS Pump BMW G20 G21 G22 G26 G28 G29 Hydraulic ABS DSC Brake Module Unit 5A4BAE8

Visual condition of the part

The product shows signs of use visible in the photos.

ABS Pump BMW G20 G21 G22 G26 G28 G29 Hydraulic ABS DSC Brake Module Unit is a specialized brake system component designed for modern BMW 3 Series and Z4 models. The module combines the hydraulic functions of the pump with electronic control of the ABS and DSC systems, ensuring precise traction control and vehicle stability. This is an OEM solution from the ABS Control Units category, which allows for professional brake system repair while maintaining factory performance parameters.

Specifications and technical data

• SKU: 5A4BAE8
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A4BAE8
• Substitutable numbers: 5A4BAE8
• Category: ABS Control Modules

Purpose and function of the ABS/DSC module

The presented module is the central control element for the ABS and DSC stability control system in selected BMW G-series models. It is responsible for:

• controlling pressure in the brake circuits during emergency braking,
• precise distribution of braking force to individual wheels,
• cooperation with the traction control system during loss of grip,
• coordinating the operation of wheel speed sensors and the vehicle's control unit.

Thanks to this, the braking system maintains stability in emergency situations, and the vehicle reacts predictably to the driver's inputs.

Benefits of using an original ABS control unit

Using an original module from the ABS Control Units group in a BMW provides a number of practical service and operational benefits:

• maintaining the factory characteristics of ABS and DSC operation,
• proper cooperation with the existing electrical installation and the vehicle's communication bus,
• possibility of diagnostics and adaptation using standard BMW service tools,
• reducing the risk of brake control errors resulting from incompatible replacements.

This solution is particularly recommended for professional repairs where parameter repeatability and compliance with the manufacturer's specifications are essential.

Product characteristics and installation

The ABS/DSC module is a complete control assembly that integrates the hydraulic part of the pump with the electronics responsible for processing sensor signals. The design is intended for installation in the engine compartment, in the factory location for the given generation of BMW 3 Series and Z4.

When replacing, it is recommended to:

• use appropriate brake system bleeding procedures,
• perform adaptation and clear errors in the vehicle's control units after installation,
• check the tightness of the brake lines connected to the module.

This type of module is intended for users and workshops that expect stable, repeatable brake system performance after repair.

Condition and service application

The offered item is in used condition, which allows for an economical repair while maintaining the original BMW specification. This is a practical solution for workshops specializing in the brand and for conscious users who want to restore full ABS and DSC functionality without resorting to unverified replacements.

Before installation, it is recommended to perform a standard verification of compatibility with the vehicle based on technical data and to carry out diagnostics after installation to confirm proper communication of the module with other car systems.

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 units, check the available parts in the BMW ABS Control Units category.

For users considering the purchase of a used ABS module or other brake system components, a guide describing the key stages of verification and selection of parts will be useful – you can find a detailed checklist in the article Second-hand brake system: how to safely choose discs, calipers, and ABS?.