One problem related to o2 sensor has been reported for the 2012 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Hyundai Elantra based on all problems reported for the 2012 Elantra.
Sold a lemon law buyback car without my knowledge. From what I understand I was to sign a document stating that I new that I was purchasing a lemon law buyback car. I did not find out until I went to get the plates for my car and they showed me the title. I contacted the dealership and basically my loss their gain. May 2015 had to replace hose and have a/c recharged costing almost $300 July 2015 had to have both from wheel bearing replaced along with tires costing me $800 June 2016 had to have end links on sway bar and cv joint and shaft replaced. This was under the powertrain warranty still in place on the car check engine light come on and off at random times. When tested said it was an O2 sensor. The back drivers side door lock sticks. So I have to manually lock it for my key fob to lock all of the doors. Today was just told I need wheel bearings and tires on the front end. I believe this car has too many issues being a newer car. I have never had a car with this many issues. Especially a newer car. I cannot get out of the loan because it is a lemon law buyback and the resale on it is horrible. I cannot afford the upkeep on the problems it keeps having. Something is wrong this car.