303.01.0004 Relay Valve — DAF / IVECO / MAN

This high-strength component serves as a critical element within the brake system, ensuring precise pressure modulation and reliable signal transmission. Designed for heavy-duty grade performance, the relay valve maintains structural integrity under demanding operating conditions, providing consistent pneumatic control within the vehicle's braking architecture.

303.01.0004 is the OE-equivalent of the WABCO 973 006 000 0 relay valve used in DAF, IVECO, MAN, RENAULT TRUCKS, and SCANIA heavy commercial vehicles. This part is also compatible with systems from FELDBINDER, IRISBUS, KEMPF, LANGENDORF, NEOPLAN, and PACCAR. It meets the strict requirements for essential pneumatic control in various truck and bus configurations.

The assembly features specific port dimensions including M22x1,5 VOSS on Port 1 and M16x1,5 VOSS on Ports 2 and 4 to ensure a secure and leak-free connection. Workshop technicians should verify the maximum operating pressure of 10 BAR and ensure all VOSS connections are properly torqued during installation to maintain optimal system performance and safety standards.