Mercedes W204 Brake Pump ABS ESP Hydraulic Braking Unit A2044314012 A2045453932

Mercedes W204 Brake Pump ABS ESP Hydraulic Braking Unit is an original component from the ABS and ESP System group, designed for Mercedes W204 class vehicles. This is a solution for users who expect stable braking system performance, proper cooperation with the vehicle's electronics, and the maintenance of factory safety parameters.

Specifications and technical data

• SKU: A2044314012-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2044314012
• Substitutable numbers: A2044314012, A 204 431 40 12, A2045453932, A 204 545 39 32
• Category: ABS & Stability Hydraulic Units

Purpose and function in the ABS/ESP system

The presented ABS brake pump is responsible for generating and precisely metering pressure in the brake circuits, working in conjunction with the ABS and ESP control module. In the Mercedes W204 vehicle, this component:

• stabilizes system pressure during emergency braking,
• supports the operation of the anti-lock braking system,
• enables effective vehicle trajectory correction by the ESP system in emergency situations,
• maintains consistent operation with the vehicle's factory electronics.

Thanks to the preservation of the original design, the pump ensures proper operating parameters of the system, which translates into predictable vehicle behavior on the road.

Benefits of using an original ABS pump

Using an original component in an area as sensitive as the brakes is crucial for safety. With this ABS pump for the Mercedes W204, the user gains:

• factory fitment to the vehicle's hydraulic and electrical installation,
• maintenance of operating parameters specified by the manufacturer,
• proper cooperation with wheel speed sensors and the electronic stability control unit,
• reduced risk of ABS/ESP system errors after installation.

For workshops and individual users, this means easier diagnostics, predictable installation, and a lower risk of software compatibility issues.

Component condition and installation aspects

The pump comes from the ABS and ESP System category and is offered as a used part, which allows for cost-effective repair while maintaining the manufacturer's original specifications. Before installation, a standard workshop procedure is recommended, including:

• verification of hydraulic connection tightness,
• bleeding the brake system in accordance with the procedure for the Mercedes W204,
• checking the correctness of communication with the vehicle's electronics using a diagnostic tester,
• checking for any errors in the ABS/ESP controller memory after the first test drive.

This approach allows for the safe restoration of full braking system functionality after replacing the component.

Selection by numbers and compatibility verification

In the case of components from the ABS and ESP System group, it is crucial to match them by part numbers and interchangeable numbers. Before purchasing, it is worth comparing the markings on the removed component with the data in the product specification to avoid problems with installation and communication with the vehicle's electronics. Comparing the body type, engine version, and vehicle year may also be helpful.

If you want to streamline the selection process and avoid mistakes when ordering online, you will find practical tips in the guide: Risk-free online parts shopping – 5 proven ways to verify component compatibility using OEM numbers and paint codes.

Expanding Mercedes brake system service

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 control modules, wheel speed sensors, or additional stability control components, check the available parts in the Mercedes ABS and ESP System category.

For those interested in a broader context of technical solutions used by the manufacturer, an interesting supplement may be an article describing the development of solutions in higher model classes: Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years.