Was anything else replaced at that time, like the water pump? Need to know what was installed then. 50,000 on it now, you can wait awhile. Make sure a new crank pulley bolt is installed this trip!!! Hyundai will know about that for sure!! So will anyone else that has worked on many of these engines! Call Hyundai to find out what is recommended @ this mileage. I know there are service bulletins that need to be checked! Consider replacement of the crank sensor as well.