SPRING - HYDRAULIC UNIT (Toyota TY00591-43472-81)

TY00591-43472-81: A worn retaining ring can allow a hydraulic unit spring to dislodge, leading to sudden loss of system pressure. This aftermarket replacement part references Toyota catalog number TY00591-43472-81. The retaining ring functions as a mechanical fastener that holds the spring in place within the hydraulic unit. If the ring fails, the spring may shift or escape, causing erratic operation or a complete pressure drop. During a routine service interval, a technician might find the ring cracked or deformed. The item ships at approximately 0.01 pounds. Verify the serial number or application, then call (562) 693-7748.

Part number variants: TY00591-43472-81, ty00591-43472-81, TY005914347281, ty005914347281