303.01.0043 Relay Valve — WABCO Compatible

This heavy-duty grade relay valve is designed to ensure precise pneumatic control within the brake system of heavy commercial vehicles. By managing air pressure-driven signals efficiently, it maintains optimal braking response and system stability during operation.

303.01.0043 is the OE-equivalent of the WABCO 473 017 004 0 relay valve used in IVECO, MAN, and MERCEDES BENZ heavy commercial vehicles. This component is fully compatible with several high-standard systems including FAUN (1614144, 1614209), IVECO (02511330, 04463736, 04688363, 42007969, 42043784), MAN (81.52150-6003, 81.52150-6005, 81.52150-9003), MERCEDES BENZ (001 429 21 44), RENAULT TRUCKS (5000465056), and WABCO (473 017 004 0) hardware.

For workshop technicians, this unit features four M22x1,5 ports (Port 1, Port 2, Port 41, and Port 42) to ensure seamless integration into existing pneumatic lines. It is critical to verify the maximum operating pressure of 10 BAR during installation to ensure long-term reliability and safety in truck and bus applications.

Regular inspection of the valve ports and connection points is recommended to prevent air leaks and maintain consistent braking performance in fleet maintenance schedules.