Mercedes W204 Brake Pump ABS ESP Hydraulic Braking Unit A2049012500 A2044312012

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. It is a complete base for restoring the proper operation of the anti-lock braking and electronic stability control systems, ensuring predictable vehicle behavior during braking and emergency maneuvers.

Specifications and technical data

• SKU: A2049012500-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049012500
• Substitutable numbers: A2049012500, A 204 901 25 00, A2044312012, A 204 431 20 12
• Color: Black
• Category: ABS & Stability Hydraulic Units

Purpose and function in the vehicle

The described Mercedes W204 Brake Pump ABS ESP Hydraulic Braking Unit is responsible for precise pressure distribution in the brake circuits and cooperation with electronic safety systems. In combination with wheel speed sensors and the stability control module, it enables:

• wheel slip control during sudden braking,
• vehicle stabilization during sudden changes in direction,
• maintaining the shortest possible braking distance in various conditions,
• consistent operation of ABS and ESP systems across the entire speed range.

Thanks to this, the braking system in the Mercedes W204 maintains predictable characteristics, and the car's reactions are more repeatable and easier for the driver to control.

Construction and technical features

The Mercedes W204 Brake Pump ABS ESP Hydraulic Braking Unit is an integrated hydraulic module that works with the vehicle's electronic control system. The design intended for the Mercedes W204 ensures proper port placement, compatible mounts, and correct operating parameters within the factory braking system.

The black housing facilitates aesthetic integration with the engine bay and other equipment components. Using an original solution from the ABS and ESP System group minimizes the risk of fitment issues and eliminates the need for installation modifications.

Benefits of using an original ABS ESP pump

Choosing this brake pump for the Mercedes W204 allows for maintaining the factory operating parameters of the braking and stability systems. Key advantages include:

• Full integration with vehicle electronics – the module works with the factory ABS and ESP control, which facilitates proper diagnostics and communication with service testers.
• Proper hydraulic characteristics – correct pressure and pump efficiency adapted to the weight and performance of the Mercedes W204.
• Stable operation of safety systems – maintaining the manufacturer's intended system reactions in emergency situations.
• Assembly consistency – matched mounting points and connection layout facilitate the mechanic's work and shorten replacement time.

Condition, origin, and service application

The item comes from the segment of used original parts, which allows for economical repair while maintaining factory specifications. It is a solution often chosen by professional workshops specializing in the Mercedes brand, especially when repairing ABS and ESP systems in older vehicles.

Thanks to maintaining the original design, the Mercedes W204 Brake Pump ABS ESP Hydraulic Braking Unit works well both for standard replacement of a damaged module and for comprehensive braking system reconstruction after a collision or hydraulic failure.

Selection and compatibility with Mercedes W204

When selecting an ABS ESP pump for the Mercedes W204, it is crucial to match it to the specific equipment version and braking system configuration. This unit is marked as Mercedes and has been designed for integration with the vehicle's factory system, which facilitates identification in service catalogs and parts selection systems.

In workshop practice, it is recommended to verify compatibility using the OEM part number and available interchangeable numbers – this information is included in the product's technical specification and helps reduce the risk of installing an incorrect module.

Expanding ABS and ESP system repairs

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

For a better understanding of how safety systems work with the vehicle steering system, it is also worth checking out practical tips regarding diagnostics and symptoms of failure – you will find them in the article "Steering system and power steering – how it works and what breaks?", which discusses, among other things, the relationship between driving stability and the operation of driver assistance systems.