2014 Elantra Driver Blinker Burnout
 

Has anyone had an issue with the driver's side blinker constantly blowing out? I've replaced the bulb twice and within a day or so it burns out again.

Of the few times I have come across that problem, it was due to the poor quality of the bulbs.
Can we ask where you might be purchasing them?
Sometimes a manufacturer will have a bad run and you just might have slid in there.
What if you tried a different store with a different bulb manufacturer one more time. Maybe a company in this hemisphere, lots of luck !

Sylvania bulb bought at O’Reillys auto parts.
 

I have two 2013 Elantra's and unless I have my dealer replace with Hyundai bulbs they burn out in a month or two.