Lexmark 40X8050 narrow media/bin full sensor is a printer service part listed for the MS510 and MS610 series. It is identified specifically for narrow media and output-bin-full sensing, making it a focused replacement component for the printer’s sensing assembly.
The parts catalog lists one sensor per machine and one per FRU, and provides a dedicated removal procedure for servicing. Its parts catalog applies to machine types 4514-630, 4514-635 and 4514-636.
This is a specific printer sensor component, rather than a general-purpose sensor or complete printer assembly.