Ear Piece (S), Noise Isolation

Sony Ear Piece (S), Noise Isolation, part 502591801 is a replacement earbud tip for the black WF-1000XM4 headset. It is the S-size version, intended to replace an individual tip when one needs to be changed.

This part is listed as one piece, with a black exterior and orange interior. Sony’s service manual identifies the noise-isolation ear piece as a separately replaceable item and illustrates how the tip is removed from and fitted onto the headset shaft.

The listing is specific to the black WF-1000XM4: the corresponding S-size tip for the Platinum Silver headset has a different part number and colour combination. The package described here contains a single black-and-orange earbud tip.