One problem related to body has been reported for the 2004 Infiniti I35. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Infiniti I35 based on all problems reported for the 2004 I35.
During routine oil change, dealer informed me that front crossmember that supports engine and transmission is rotting/ rusting. "engine/ transmission may drop". Dealer informed that they could not perform the repair, was told to "consult a body shop". I have found that this is a common problem with (Nissan) Infiniti I35 and (Nissan) maxima bodies.