Two problems related to gas recirculation valve (egr valve) have been reported for the 2008 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Nissan Altima based on all problems reported for the 2008 Altima.
After replacing my transmission, the car continued to sputter anytime I was driving for more than a few miles. My mechanic figured out that the catalytic converter was overheating to about 600 degrees when it should have been no more than 250 degrees, causing parts of the engine to begin melting. The check engine light never came on to alert me of this issue, and I may now have permanent engine damage.
As I got off the interstate (driving 60 mph) then reduced my speed to 20 when I tried to accelerate it wouldn't go!! it would not accelerate and my rpm would climb up to 4 or 5! I had to drive all the way back home on interstate driving 20 mpg!!! it's happened only when I travel long distances!! I am highly dissatisfied with the Altima! everyone I encountered about the 2006-2008 Altima regrets getting one.