Torn inner CV boots are very common on 2000MY and up late-model Subaru vehicles.
DO NOT REPLACE THE ENTIRE CV SHAFT WITH A CHEAP AFTERMARKET/REMAN UNIT! Most likely this will cause driveline vibrations, especially when stopped in drive on automatic transmission vehicles.
Here I show how to quickly replace the inner boot without removing the CV shaft from the vehicle. You can save a lot of time, money, and potential driveline problems if you don't mind getting a little grease on your hands :)
No special tools required!