421 350 923 2 Heavy Series Coil for Gearbox Housings
303.11.0052
Summary
This heavy-duty series coil is designed for gearbox housing assemblies in heavy commercial vehicles. It functions as the electrical drive element for electro-pneumatic valve assemblies, ensuring precise gear, split, and range shifts. Built with high-strength components to withstand high vibration and engine-bay temperatures. Compatible with WABCO systems. Equivalent to OE WABCO 4213509232.
| EAN Code | 8699031073095 |
|---|
Ready to Order
Compatible OEM Codes
-
WABCO
- 421 350 923 2
-
MERCEDES BENZ
- 002 540 37 97
Description
What does a gearbox housing coil do?
The gearbox housing heavy series coil serves as the critical electrical drive element within the electro-pneumatic valve assembly of automated transmissions. By converting electrical signals from the control unit into a magnetic field, this component facilitates the opening of air valves to direct compressed air toward the shift actuator. This process is essential for managing gear, split, and range shifts in heavy commercial vehicles.Durability and construction features
This component is designed to operate within demanding environments, specifically engineered to maintain winding integrity under continuous vibration and temperatures approaching 100°C. The construction utilizes high-strength components and specialized sealing to prevent the ingress of moisture and dust, which protects against short circuits and maintains signal accuracy. It is also compatible with WABCO systems.Installation and technical verification
For professional installation, technicians should verify the transmission model and the specific mounting position on the valve block, whether it is for gear, split, or range applications. It is vital to ensure the connector type and pin layout match the existing vehicle wiring harness to avoid triggering fault codes during operation.Maintenance and troubleshooting
Regular inspection of the coil's sealing and electrical resistance can help prevent sudden transmission shift failures. Selecting a coil that matches the original technical specifications ensures optimal shift speed and transmission longevity.OE cross-reference
303.11.0052 (Gearbox Housing Heavy Series Coil) is the equivalent of the WABCO OE number. This part directly 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
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| EVOBUS | |||
| MERCEDES BENZ | |||
| WABCO |
FAQ
What is the function of a gearbox housing heavy series coil?
It acts as an electrical drive element that converts signals into a magnetic field, directing compressed air to shift actuators for gear changes.
What are the common symptoms of a faulty coil?
A failing coil may cause incorrect gear shifting, delayed shifts, or trigger fault codes in the transmission control unit.
How should I verify compatibility with my transmission?
Check the mounting position (gear, split, or range), connector pin layout, and verify against the original equipment specifications.
Can this coil withstand high engine temperatures?
Yes, these heavy-duty series coils are built with high-strength components designed to maintain integrity near 100°C.
What are the OE reference numbers of this part?
303.11.0052 directly replaces WABCO OE number 4213509232.