One problem related to engine exhaust system has been reported for the 2013 Volkswagen Jetta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Volkswagen Jetta based on all problems reported for the 2013 Jetta.
Based upon my own personal experience and other owners comments found on the the web, there appears to be an issue with various exhaust leaks on late model Jetta tdi's which allows dangerous diesel sulfur fumes to enter the cabin.