Brake Load Sensing Valve Assembly Fit For Nissan D21 Pickup Hardbody 2.4L 1993-97 OEM: 46400-56G04 Function: The function of the valve is to prevent the fluid from flowing back to the master cylinder and maintain a small amount of pressure in the pipeline. Automatically adjusts brake pressure according to real-time weight changes, delivering balanced stopping power whether empty or fully loaded. Enhances braking response and stability through precise hydraulic control, reducing the risk of rear wheel lock-up., Manufacturer: ATEHDEN