Compatible Motors for Engine Swap?

The 2011 Hyundai Sonata and the 2013 Kia Optima both use the same 2.4-liter GDI (Gasoline Direct Injection) four-cylinder engine as one of their engine options. In general, when considering an engine swap between vehicles, it's ideal to swap engines that are as similar as possible in terms of specifications, engine management systems, and emissions controls.

In your case, since both the 2011 Hyundai Sonata and the 2013 Kia Optima with the 2.4-liter engine likely have similar engines in terms of displacement and fuel delivery (GDI), there's a reasonable chance that the engines could be compatible for a swap. Wrecking yards have special software that tells them which motor fits into what so I would call one to see if you can get information from them.