I have a 2009 V8 that only has 24k miles on it. One random day it just started running super rough at idle after pulling out of a parking spot. Multiple engine lights came on and drove it home. I had to trailered to the dealership and they found that one of the rockers broke and part of the valve broke off and melted into the cylinder. They said a complete engine swap is the only fix. I'm not able to swing a new engine now so sounds like I will be trying to sell my car as is if anyone wants to fix it themselves. I just put 4 brand new shocks this summer on top of it also, just sucks.