Paul in Houston TX wrote:

The correct fan and part number depends on which one is in your machine.
It could be either depending on graphics chip.
I get all my Lenovo parts from Ebay.
Go there and compare fan pictures to yours.
Btw, IBM sold their laptop business to Lenovo in 2005.

That *is* a picture of the numbers printed on the sticker directly
on the fan!

http://i.cubeupload.com/PPtURP.gif

All I'm asking is what are the numbers to look for.