A0025403797 Mercedes-Benz Gearbox Housing Coil

What does a gearbox housing coil do?

This transmission housing heavy-duty coil acts as the essential electrical drive element within the electro-pneumatic valve assembly of automated transmissions. By converting electrical signals from the control unit into a magnetic field, it moves the valve piston to direct compressed air toward the gear, split, or range actuators. This component is engineered to withstand the extreme vibrations and high temperatures typical of heavy commercial vehicle engine bays.

Compatibility and application

This specific part is compatible with Mercedes-Benz vehicles. It is specifically designed to maintain integrity during frequent switching cycles in pneumatically controlled gearboxes, ensuring smooth transitions and drivetrain reliability.

Installation and maintenance guidance

For successful installation, technicians should verify the transmission model and ensure the coil matches the specific mounting position on the valve block. It is critical to confirm that the connector type and pin layout align with the existing wiring harness to prevent electrical faults or error codes during service.

Troubleshooting gear shift issues

When troubleshooting shifting issues, such as delayed or harsh gear changes, inspecting this coil for winding resistance deviations or seal integrity is a recommended step in transmission maintenance.

OE cross-reference

303.11.0052 (Gearbox Housing Heavy Series Coil) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number A0025403797.