One problem related to crankcase (pcv) has been reported for the 2011 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Elantra based on all problems reported for the 2011 Elantra.
Oil leaked from the crankcase seal while driving. A mechanic replaced the seal, which failed almost immediately. There are metal fragments in the fresh oil.