Starter problems of the 2016 Hyundai Accent

Air bag - passenger side air bag light is illuminated and will not turn off when the vehicle is started and while driving. ( issue has been ongoing for the past 6 months and dealer wants to charge for diagnostic- car is 2years old!). Electrical- warning lights and radio turn on and off randomly while driving) other- often the car won't start (2-3 times/week) and have to get a jump. Battery is new, starter is good. Possibly issue with amps? (auto zone diagnostic did not show issue or codes). There are no recalls on this year ,make and model (2016 Hyundai Accent). There has been issues and recall with the 2015 make and model of the same with the air bag light coming on and staying on. Believe it was thought to be due to computer issue that affected kia as well. ( this must be a safety issue if the air bag (passenger) stays illuminated and shows the air bag to be off (wwith or without an adult passenger. Hyundai refuses to investigate saying lack of complaints and must be issue with just my vehicle. Warranty- does not cover as the mileage on my vehicle is over the allowance for the warranty.