Chevrolet Cobalt owners have reported 1 problem related to rear window defogger (under the visibility category).
Rear window defrost stopped working. Was told by dealer that the connector for the rear defrost was melted. Upon doing research on defective rear defroster on 2007 chevy Cobalt, this appears to be a common problem with this make/model/year. I believe there should be a recall for this part.
See all problems of the 2007 Chevrolet Cobalt.