One problem related to gas recirculation valve (egr valve) has been reported for the 2004 Hyundai Santa Fe. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Hyundai Santa Fe based on all problems reported for the 2004 Santa Fe.
So many things going wrong back seat belts don't work, washer pump don't work tried to order part from dealer do not have any in us the camshaft sensor pigtail disintegrated from being to close to the engine and no one sells the part have to buy the complete engine wiring kit for one little plastic piece there should be a recall on this I read online that everyone with this car had the same problems.