Hopefully that's what we shipped you
If it doesn't have the groove and it came with a spare piece of PTFE, then it's the right one!
It's unlikely to be the motor. An often-overlooked cause of clicking and other extruder problems is the screw that acts as a bushing for the ball bearing pressure wheel. Over time, the threads on the screw wear down and then the bearing sits cockeyed on the screw and causes grief. Also, the bearing itself can wear out - it's 7mm OD, 3mm ID, 3mm wide.
Julia