303.01.0011 Relay Valve — Mercedes-Benz Compatible

The technical precision of this relay valve ensures stable pneumatic control within the brake system of heavy-duty vehicles. Designed to manage air pressure transitions efficiently, this component provides the reliability required for demanding transport environments. Its construction utilizes high-strength components to maintain structural integrity under constant operational stress.

This part is the OE-equivalent of the WABCO 973 011 001 0 relay valve used in various heavy commercial vehicle systems including Mercedes-Benz, MAN, Scania, and DAF. It is also compatible with several other major manufacturers such as FAW, King Long, and Otokar to ensure seamless integration into existing braking architectures.

Workshop technicians can rely on the specific port configurations—M22x1,5 VOSS for ports 1 and 2, and M16x1,5 VOSS for port 4—to ensure a precise fit during assembly. Regular maintenance of the pneumatic lines and monitoring the 10 BAR maximum pressure threshold is recommended to maintain optimal braking performance and prevent system fatigue.