Yaw Sensor Mercedes ML W164 W221 W251 ESP Rotation Rate Unit Module A0045423918

The Mercedes ML W164 W221 W251 ESP Control Module is an original part from the Electronic Control Units and Controllers group, designed for the Electronic Stability Program in select Mercedes models. A used ESP controller allows for professional repair of the factory safety system, maintaining its design and operational logic in accordance with manufacturer standards. This is a solution for users who want to restore full system functionality without altering the vehicle's electronic architecture.

Specifications and technical data

• SKU: A0045423918
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0045423918
• Substitutable numbers: A0045423918, A 004 542 39 18
• Category: ECUs & Computer Modules

Purpose and Function of the ESP Controller

The ESP control module is responsible for processing signals from vehicle sensors and controlling the braking and drive systems in critical situations. In practice, this means:

• maintaining directional stability during sudden maneuvers,
• active correction of axle slip,
• cooperation with ABS and ASR systems,
• ensuring predictable vehicle behavior in corners.

By using an original controller, the consistency of software and hardware with other Mercedes electronic systems is maintained, which reduces the risk of communication errors on the CAN bus.

Benefits of Using an Original Mercedes Module

Choosing a factory ESP controller for a Mercedes ML, W221, or W251 primarily ensures a precise fit for the specific vehicle platform. You receive a component designed to work with:

• the factory braking system,
• original wheel speed and acceleration sensors,
• central comfort and safety modules.

This solution simplifies diagnostics, coding, and potential software updates at a service center, and also helps maintain the configuration consistency of the entire vehicle's electronics.

Product Characteristics and Installation

The offered module belongs to the Electronic Control Units and Controllers group, meaning it is designed to operate within Mercedes' complex electrical architecture. Before installation, it is recommended to:

• verify compatibility by OEM number and any interchangeable numbers,
• check the vehicle's equipment configuration,
• plan for controller adaptation or coding using an appropriate diagnostic tester.

Professional installation and correct coding of the module will restore full ESP system functionality without the need for wiring modifications.

Why Consider a Used ESP Controller

A used ESP module is a solution that helps reduce repair costs while maintaining the original part specifications. In many cases, it is a technically sound alternative to a new component, especially if you prioritize:

• maintaining the vehicle's factory configuration,
• compatibility with the existing wiring harness and sensors,
• the ability for diagnostics compliant with manufacturer documentation.

To better understand the principles of selecting and installing used controllers, it is worth consulting the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?

Expanding Mercedes Electronics Systems

If you are planning a comprehensive repair or upgrade of the control electronics in your Mercedes and require other parts from the same group, such as comfort modules, engine controllers, or safety system controllers, check the available parts in the Mercedes Electronic Control Units and Controllers category.