Mercedes W204 Brake Pump ABS ESP Hydraulic Control Unit A2044312212 A2045455232

Mercedes W204 Brake Pump ABS ESP Hydraulic Control Unit is an original hydraulic control module designed for the electronic stability program and anti-lock braking system. This component is responsible for precise pressure regulation in the brake circuits, working in conjunction with ABS and ESP electronics, which translates into safe braking in diverse road conditions and stable vehicle handling. Thanks to the factory Mercedes design, the module ensures proper integration with other brake system components.

Specifications and technical data

• SKU: A2044312212
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2044312212
• Substitutable numbers: A2044312212, A 204 431 22 12, A2045455232, A 204 545 52 32, BG
• Category: ABS & Stability Hydraulic Units

Purpose and function in the ABS and ESP system

The hydraulic ABS/ESP controller in Mercedes W204 models is responsible for dynamic brake fluid pressure control in individual wheel circuits. Based on signals from wheel speed sensors and the electronic stability control unit, this module:

• regulates pressure in the brake circuits during emergency braking, reducing wheel slip,
• supports the ESP system in correcting the vehicle's path through selective braking of individual wheels,
• ensures repeatable, predictable brake system response in emergency situations,
• maintains vehicle stability on surfaces with varying grip.

As a result, the driver receives more controllable braking and better vehicle stability, especially on wet, slippery, or uneven surfaces.

Benefits of using an original Mercedes module

Using an original hydraulic ABS/ESP module dedicated to the Mercedes W204 allows for maintaining the factory performance parameters of the brake system. This means:

• compliance with the factory operating characteristics of ABS and ESP systems,
• proper cooperation with the control unit and vehicle sensors,
• perfect fit for the car's hydraulic and electrical installation,
• reduced risk of system errors and warning messages on the instrument cluster.

Choosing such a component is particularly important when repairing vehicles equipped with advanced safety systems, where the precision of the ABS and ESP system is crucial for driving safety.

Component condition and service application

The offered module from the ABS and ESP System category is intended for service applications as a replacement for the factory-installed component in a Mercedes. It is suitable for both repairs following a brake system failure and for replacing a worn or damaged hydraulic unit. Thanks to the original design, it is possible to restore the proper operation of braking assistance systems without the need for vehicle installation modifications.

Selection by numbers and vehicle integration

The module has been designed specifically for the Mercedes brand, which facilitates its identification and selection based on manufacturer data. In service practice, selection is usually based on the OEM part number and interchangeable numbers, which allows the component to be matched to the specific vehicle configuration and equipment version. This approach minimizes the risk of incompatibility and speeds up the repair process, while the installation itself involves correctly connecting the brake lines and electrical connectors, followed by bleeding the system.

Expanding technical knowledge

When working with advanced vehicle systems such as ABS, ESP, or the fuel system, it is worth expanding your knowledge regarding diagnostics and selecting parts by OEM numbers. Practical information on component operation, diagnostic methods, and regeneration can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses, among other things, the principles of selecting components by catalog numbers and VIN.

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other elements from the same group, such as pumps, control modules, or hydraulic valves, check the available parts in the Mercedes ABS and ESP System category.