One problem related to manifold/header/muffler/tail pipe has been reported for the 2014 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Nissan Altima based on all problems reported for the 2014 Altima.
Lach in hood doesn't work and I'm scared it will open while I'm driving and my catalytic converter manifold is not working properly (engine light on).