Nissan Pathfinder - common issues and repairs

The 3rd gen Pathfinder (2004-2011) is a great choice if you want a rugged, roomy and dependable used car for around $5000. I just picked this one up and I've been sorting through issues that resulted from many years of wear, tear and neglect. Here's what I've learned about the common issues associated with this platform - and how to repair them. I cover common P0420 and P0456 CELs, evap/vacuum leaks, starting issues, O/D off appearing randomly, seat rips, armrest rips, fuel door repairs, and more.