One problem related to manifold/header/muffler/tail pipe has been reported for the 2012 Chevrolet Sonic. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Chevrolet Sonic based on all problems reported for the 2012 Sonic.
At 54,600 miles it was using oil and smooking out the exhaust !! in motion. The intake manifold had a bad check valve and intake had to be replaced ,very common on the 1. 4 turbo engine as I found out by googling this issue ,no update on manifold so this will happen again !!!.