Mercedes W204 Genuine Universal Car Relay 4-Pin Tyco X4 Black A0025421319

Mercedes W204 4-Pin Black Tyco Relay A0025421319 X4 is an original component from the Electronic Control Modules and Controllers group, designed for use in Mercedes vehicle electrical systems. Its compact, black housing and four-pin connector ensure a secure fit in the socket and stable system operating parameters. This is a practical solution for users who want to restore the correct operation of control circuits without altering the factory installation architecture.

Specifications and technical data

• SKU: A0025421319-4
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0025421319
• Substitutable numbers: A0025421319, A 0025421319, A 002 542 13 19
• Color: Black
• Category: ECUs & Computer Modules

Technical Characteristics and Application

The four-pin relay in its black version is an actuator used in many control circuits in Mercedes W204 class vehicles. Thanks to its construction based on Tyco technology, it ensures repeatable circuit switching while maintaining stable electrical parameters. The four pins allow for a classic control configuration, often used in circuits powering receivers, auxiliary modules, or comfort systems.

This component works with the vehicle's factory wiring harness, which simplifies installation and reduces the risk of installation errors. Using an original relay ensures compliance with the vehicle manufacturer's requirements regarding current carrying capacity, switching characteristics, and resistance to operating conditions in the engine bay or vehicle interior.

Construction, Color, and Mounting Ergonomics

The black relay housing is visually neutral and blends well with other components in the fuse box and electrical modules. The color aids identification among other components while not introducing unnecessary contrast in the mounting area. The four-pin connector is designed to ensure a secure contact with the socket and resistance to vibrations typical of vehicle operation.

The relay is designed for installation in standard sockets used in Mercedes systems, allowing for plug-and-play replacement – without the need for wiring modifications or additional adapters. This design facilitates quick servicing and reduces vehicle downtime.

Benefits of Using an Original Mercedes Relay

Using an original relay in a Mercedes vehicle translates into several significant operational benefits:

• maintaining operating parameters consistent with the vehicle manufacturer's specifications,
• stable circuit switching under typical installation loads,
• compatibility with factory control modules and controllers,
• reducing the risk of interference with other onboard electronics.

A used OEM part is a sensible compromise between repair cost and maintaining high quality of workmanship. In many cases, it can effectively solve problems with unstable receiver power supply, intermittent module operation, or random circuit disconnections.

Professional Approach to Automotive Electronics

Selecting the right components from the Electronic Control Modules and Controllers group directly impacts the reliability of the entire electrical system. It is advisable to use original solutions, especially in vehicles equipped with extensive comfort and safety electronics. If you want to understand more broadly how modern electronic systems work in premium cars and how to safely use parts from dismantled vehicles, check out the article on the advantages of used original OEM parts and their impact on car safety.

For users interested in the broader context of electronic module operation in premium cars, the material on servicing multimedia systems and controllers in other brands may also be useful. For this purpose, it is worth looking at the entry describing how to care for iDrive systems and electronic modules using proven parts from dismantling, which demonstrates good practices when working with vehicle electronics.

Summary

Mercedes W204 4-Pin Black Tyco Relay A0025421319 X4 is a practical choice for those who want to restore the correct operation of the electrical system while adhering to manufacturer standards. Its original design, four-pin connector, and compatibility with factory sockets make this component an excellent replacement part for professional service and for conscious, DIY vehicle repairs.