I've had trouble with my Elantra for some time now, but nothing this severe. One day, after showing no warning signs, my husband and I were on our way to my work and his school and while we were slowing down at a red light, my car completely shut off. Power steering and all. It would not restart and we were panicking. Some nice men came and pushed us to the side where we sat for about 15 minutes. The car then started back up and we drove it like it was normal. We traveled roughly an hour at about 60MPH(no stops or slowing down) with no problems. Once we came to a stop light however, the car died again. 20 minutes later it started back up. As we were coasting on an exit ramp it died again!! Of all the 6 or 7 times it died that day it was always around low speeds(under 30mph) and while coasting or coming to a stop. I took it to the dealership where they replaced my Mass Air Inflow Sensor, which we thought was the problem, but it died the next day. I then took it back one more time and they told me I need a new Crankshaft Positioning Sensor. I've done some research on the CPS but am not sure if it sounds like problems I have dealt with or not. Can anyone give me some advice? Thanks so much!