My 2008 S Type drivers side window is not working correctly. It jerks and stops on the way down. I removed the door panel and found that the gear in the regulator appears to be damaged or worn.
I want to replace the regulator.
here is the best place to purchase and reliable replacement.
And is there any guidance to removing and replacing the regulator

 

Here is a thread, with pics, that covers repairing your existing regulator (obtained via a simple Forum search, BTW):

https://www.jaguarforums.com/forum/s...egulator-8093/