Two problems related to manifold/header/muffler/tail pipe have been reported for the 2008 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mazda MAZDA3 based on all problems reported for the 2008 MAZDA3.
Engine makes noise and vibration when trying to cool.
Vehicle has excessive vibrations causing a detectable noise at the exhaust flange seal.