New member, browsing for a little while. Got a 2009 AWD with high miles on it with an arms length list of engine codes all related to timing, and was up to the challenge. Was able to replace timing chains, guides and tensioner, cam sprockets, servos and positioning sensors, but after I was done I had misfire on bank 1 (all odd cylinders) so I had to tear it back down, assuming I had a tensioner fail and slip a link. I didn't find anything wrong with any of that. I purchased and installed new intake and exhaust cam sprockets. Put it all back together and all is good now...it's a tight fit, and you have to lift the engine a little, but you can do this in the car. Anyone need theirs done, took me 12 hours start to finish the 2nd time around.