One problem related to gas recirculation valve (egr valve) has been reported for the 2011 Hyundai Tucson. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Tucson based on all problems reported for the 2011 Tucson.
The car would not start when I went to start it up. It was parked outside overnight in 20 degree weather and just clicked when I went to start it. I had to call Hyundai roadside assistance to come and jump the car. They did and it took them a couple of tries and they had to use their vehicle, not the portable starter. They said that the battery was drained. There was no reason for that because there were no lights left on. I took it in for service and they checked the battery and said it was it happened again on February 3, 2013 and I had to do the same thing. I had the dealership check the battery and it was fine. On March 15, 2013, the dealership checked the battery and it registered a strong charge. The dealership wanted me to leave the car there overnight to duplicate the conditions of the car not starting up, but were not willing to let me use a free loaner. As the temperature warmed up, it was not an issue. However, today I went to start my car and leave for work, the vehicle did not start up. It just clicked, the radio worked, lights worked, but the engine would not turn over. I am taking the vehicle to the dealership later today and they will let me use a loaner for free. I hope that they are able to diagnose and fix the problem as I need my vehicle for transportation.