RING - PISTON (Mitsubishi MB1039903)

MB1039903: A worn retaining ring can allow a piston to shift, leading to loss of compression or mechanical noise. This aftermarket replacement part references Mitsubishi as the OE maker and cross-references part number MB1039903. The ring secures the piston within its bore by snapping into a groove, preventing axial movement during operation. If the ring fails, the piston may dislodge, causing sudden power loss or internal damage. In a rebuild scenario, replacing the ring is a standard step to restore proper assembly. The item ships at approximately 0.07 POUNDS. Verify the serial number or application, then call (562) 693-7748.

Part number variants: MB1039903, mb1039903