One problem related to automatic transmission cooler has been reported for the 2008 Nissan Sentra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Nissan Sentra based on all problems reported for the 2008 Sentra.
Air bag started flashing and has not stopped. I noticed there are several complaints regarding the airbags in this type of vehicle and I am waiting to see that this is investigated and help with a recall due to the cost of attempting to fix this when it could well be a factory defect. I also had to repair the transmission a year and a half ago when while on the freeway started having issues ending in the Nissan dealer in utah short of $3500 later after they determined it has to be replaced because of a malfunction due to a cooling system problem, which needed a cooling device of some sort in order to prevent it from overheating, which is exactly what happened to my car.