Hello I will help you with your question,
Any reflash of the ECM is directed by TSBs that address specific issues that the Hyundai engineers identify from techline call logs and warranty claims. A general tuning flash is not made available through Hyundai for any year or model.
If you are experiencing a specific issue and there has been a software upgrade released it will be applied during the normal course of any service or warranty work that is performed at any Hyundai service facility
Let me know if you have further questions about this
Thank you
ASE Master Technician
ASE Master Tech 10+ yrs, AAS Automotive Technology, Factory trained Asian specialist