Here is the link for the Nexus 4 Android 4.2.2 (JDQ39) update. Instructions to manually update without root, here. If you have a custom recovery, you should just be able to flash the .zip file, assuming you are 100% stock.
The update is 51MB in size.
Via: XDA
This post was last modified on July 8, 2013 9:24 am