Four problems related to manifold/header/muffler/tail pipe have been reported for the 2001 Nissan Maxima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Nissan Maxima based on all problems reported for the 2001 Maxima.
The intake manifold gasket needed to be replace at 87,000 miles. I have noticed that other Maxima owners have had the same experience.
Rear muffler, and gasket needed to be replaced, rotted and loose.
Rear muffler flange will completely rust-through, causing separation of muffler and intake pipe. Exhaust fumes will leak at this point which is near rear passengar seating. Both muffler and corresponding exhaust pipes are solid and relatively free of rust, however failure of this flange resulted in both pipe and muffler replacement. This seems rather extreme for a flange failure. Problem ocurred within four years of ownership (car was purchased new). A letter was sent to the manufacturer, they responded my stating car was out of warranty. My out of pocket expense $300.
While driving 70 mph engine check light came on. Vehicle started to run rough and hesitated. Vehicle was taken to the dealer, and dealer inspected and diagnosed the vehicle with the following problems: both rear oxygen sensor needed to be replaced, the ecm needed to be reprogrammed, and both front and rear engine mounts were weak, and needed to be replaced. Also, manufacturer was notified. Replace two motor mounts and two rear oxygen sensors.