I have a '16 Santa Fe Sport, bought is last October and live in Florida. One thing about living here is that is does get hot. Well, in late April when the temp starting get above 85, the car would not start. It would in the morning, but after sitting in the sun, it would not. All it did was show the system checks on the display with all light flashing, over and over and over until I turned it off. This has the push button start. The first thing I noticed was the brake pedal was firm. I mean, it would not budge. So I'm thinking it's a brake problem, not electrical. Anyway, no start, call for a tow, the driver arrives late in the after noon, cooler, car starts. Dealership checks everything out and says battery has dead cell, replaced. 7 days later, same thing, starts fine in the morning, drive to several places, later in the after noon after sitting in the sun, no start. Call for a tow, arrives later in the after noon, car starts after driver mashes parking break several times, moves key fob around start button, car starts. Dealership says vacuum hose has crack and replaced. I go to pick up and it won't start at dealership. A week later, the vacuum pump now replaced. Ok, I tell service to park car in sun and call me later. get a call and car won't start. 5 weeks later after Hyundai techs advise on what to check, I get car back and it drives for 3 weeks with no issues. They replaced 3 relays and the start button assembly. Again, won't start when my wife wanted to go to store. Call for tow and driver arrives really late, like 930 pm and same driver as previous time. Car starts. Every day there was a starting issue was on a Friday or Saturday. 5 more weeks in the shop, this time a Hyundai tech comes to inspect car himself. Every electrical connection and plug pulled, cleaned and put back. Service tech accidentally touches power steering assist motor under dash and it's hot. Car not running and it's 110. New steering column installed along with brake light switch just for good luck. I file for lemon law on August 11th and get car back on 12th. Get notice from Hyundai to attempt service 1 more time on August 24th. Meet with Hyundai rep and service manager telling them I want a new replacement, this car is not dependable and possibly now a safety hazard. At this point, car has been in the shop 5 times for 78 days. Later the 24th, the service manager calls me and says car won't start. Now on its 83rd day in shop.