One problem related to loud engine noise has been reported for the 2007 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Hyundai Sonata based on all problems reported for the 2007 Sonata.
Engine makes a very loud noise and cannot be used. This car was very well maintained and just out of warranty. Loud noise in cylinder and crank shaft. Hyundai says engine needs to be replaced. This can happen to anyone who would be left stranded or in a bad situation. Hyundai does acknowledge a problem, but so far no recall.