My Taz 5 has developed a squeaky X-Axis. The rods look clean and any attempt to clean them fails to remove dirt. This is causing my prints to drift to the left as they are built up, It’s like the printer does not always move to the right enough.
Those are the right bearings, but they probably do not need to be replaced yet. Can you identify where the squeak is coming from by pushing on the various X axis parts? The bearing holders may just need to be moved closer together (If it is bearing related).