PACKING - U CUP (Nissan NI58621-L1400)

A worn U-cup packing can allow fluid leakage past the seal, reducing system pressure and causing erratic movement. The aftermarket replacement part cross-references Nissan part number NI58621-L1400. This seal type relies on a flexible lip to maintain contact with a moving surface under pressure. A failed U-cup often leads to visible drips and gradual loss of actuation force. In a typical application, the seal must withstand repeated cycling without hardening or cracking. The item ships at approximately 0.03 pounds. Verify the serial number or application, then call (562) 693-7748.

Part number variants: NI58621-L1400, ni58621-l1400, NI58621L1400, ni58621l1400