303.01.0040 Relay Valve — WABCO Compatible

The 303.01.0040 Relay Valve is a critical component within the pneumatic brake system of heavy commercial vehicles, designed to regulate air flow and ensure precise braking response. This part is engineered with heavy-duty grade materials to withstand the rigors of constant pressure changes and high-intensity operation in demanding transport environments.

This product is the OE-equivalent of the WABCO 973 011 2 03 0 relay valve used in various heavy-duty vehicle applications. It is fully compatible with systems from FAUN (99707005415), IVECO (41025604, 5801101682), LEYLAND (EXABR303), LIEBHERR (502661508), SCANIA (2090240), VAN HOOL (10833312), VOLKSWAGEN TRUCK (2TA 607 409), and WABCO (973 011 2 03 0). It also serves as a reliable replacement for parts used in models by KENWORTH, MACK, PETERBILT, and VOLVO.

For workshop technicians, this relay valve features specific port configurations including M22x1,5 for main ports and M16x1,5 for auxiliary ports to ensure seamless integration into existing pneumatic circuits. Regular inspections of the port seals and air pressure levels are recommended to maintain peak braking performance and system integrity during routine maintenance cycles.