One problem related to engine cooling system has been reported for the 2003 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Hyundai Elantra based on all problems reported for the 2003 Elantra.
My wife was driving on a freeway approx 65 mph when she heard a loud pop, looking at the dash board all gauges reported nothing wrong. Suddenly a large amount of white smoke came from under the hood, blinding her visibility and cars behind her. She was able to veer off to the median and call for assistance. The repair shop noted that a plastic reservoir tank exploded and drained all coolant and damaged the radiator and recommended calling Hyundai since car is in warranty and suggests that engine damage (seal damage may result in complete damage of engine and need replacement) the car is currently at dealership. This is a similar report as listed and may cause serious injury or death due to smoke disabling drivers view.