One problem related to engine exhaust system has been reported for the 2006 Chevrolet Cobalt. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Chevrolet Cobalt based on all problems reported for the 2006 Cobalt.
Exhaust - muffler - went to 3 different service places and the baffles in the muffler are bad and rattling around inside the muffler. None of the commercial service places are able to put a new muffler on as chevy has not released the muffler to my 2006 chevy Cobalt ss - called the dealership and they say it is not covered under my extended warranty - the car is only 3 years old and has not been in any accidents. Dealership does not stock this muffler and wants almost $550 just to replace the muffler. I will be looking for a new car and not a chevy!!.