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303.11.0052 Gearbox Housing Heavy Series Coil, Gearbox

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303.11.0052 Gearbox Housing Heavy Series Coil

303.11.0052

Summary

This heavy-duty series coil is designed for the electro-pneumatic valve assemblies in automated transmissions of Mercedes-Benz and Evobus trucks. It ensures precise gear, split, and range shifts by converting electrical signals into pneumatic action for heavy commercial vehicle reliability. Equivalent to OE Mercedes-Benz 0025403797 and WABCO 4213509232.

Product identifiers
EAN Code8699031073095
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Compatible OEM Codes

  • WABCO
    • 421 350 923 2
  • MERCEDES BENZ
    • 002 540 37 97

Description

What does a gearbox housing coil do?

This transmission housing heavy-duty coil serves as the critical electrical drive element within electro-pneumatic valve assemblies. It manages gear, split, and range shifts in the automated transmissions of heavy commercial vehicles by converting electrical signals from the control unit into a magnetic field. This action opens the air valve to direct compressed air to the shift actuator, ensuring smooth drivetrain operation.

Compatible vehicles and applications

This component is specifically designed for use in Mercedes-Benz and Evobus trucks. It functions effectively within the complex pneumatic systems of these heavy commercial vehicles to maintain shifting precision. The heavy-duty construction is engineered to withstand high vibration and the extreme temperatures typically found in the engine bay.

Installation and maintenance guidance

When performing maintenance, technicians should verify the mounting position on the valve block—whether it serves the gear, split, or range function—to ensure correct fitment. Proper installation is vital to prevent delayed or harsh shifts. Check the compatibility list to confirm fitment with your specific transmission model.

Troubleshooting shifting issues

If gear shifts become delayed or fail to occur, inspecting the solenoid coil is a recommended diagnostic step. Maintaining these high-strength components helps preserve the overall service life of the transmission system.

OE cross-reference

303.11.0052 (Gearbox Housing Heavy Series Coil) is the equivalent of the Mercedes-Benz and WABCO OE numbers. This part directly replaces Mercedes-Benz OE number 0025403797. It also replaces WABCO OE number 4213509232.

Other OEMs

MERCEDES BENZ

  • A0025403797
  • 0025403797
  • 002.540.3797
  • 002.540.37.97
  • 002 540 3797
  • 002 540 37 97

WABCO

  • 4213509232
  • 421.350.923.2
  • 421 350 923 2

Related Products

Repair Kits

Used In

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
EVOBUS
MERCEDES BENZ
WABCO

FAQ

What is the function of a gearbox housing coil?
It acts as an electrical drive element that converts electrical signals into a magnetic field, moving a valve piston to direct compressed air for gear shifts.
Which vehicle types use this heavy series coil?
This component is designed for heavy commercial vehicles, specifically compatible with Mercedes-Benz and Evobus truck transmissions.
What are the symptoms of a failing shift coil?
Common symptoms include delayed gear shifts, harsh shifting transitions, or a complete failure of the gear selection process.
How should I select a replacement coil?
Verify the transmission model, mounting position (gear, split, or range), and ensure it matches the required electrical specifications for your vehicle.
What are the OE reference numbers of this part?
303.11.0052 directly replaces Mercedes-Benz OE number 0025403797. It also replaces WABCO OE number 4213509232.