One problem related to software 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.
The clock spring has worn after roughly 55k miles and just being out of warranty. Dealer replacement is $300 and airbags will not deploy without repair. This began after going over rough brick pavers and the light is intermittently on, probably about 80-90% of the time. As I understand it the veracruz and santa fe models had a similar issue a few year prior (11-01-052) and online searches show this is a common issue with (at least) early production elantas. While owner diy replacement is possible, it is not recommended due to srs system importance as well as lack of ability to recalibrate software.