i just got my 2011 pro-4x 6speed manual, in August 2015. no issues. all stock. just replaced the batter but it has been doing something interesting since i got it. every now and then after i park the radio will flash 3 or 4 times then i turn the key off and it stays running for up to three minuets even after i get out of the car. then eventually shuts off and locks its self... wtf is going on? is this normal for the xterra? also when taking off, are the fans supposed to be all running hard?