Almost 60(?)k miles on my '15 ultimate.
Some items I had done:
- Infotaiment screen. It was replaced due to a blotch on it.
- Moonroof assembly replaced due to creaking.
- HD radio antenna had to be reseated right after that, though the dealer said it was probably was their fault while replacing the moonroof.
- The '15 DRLs are the turn signal bulbs so those will be out of pocket replacements when they burn out (incandescent) and if you leave em on, will be pretty often. Its a wear item but they're fairly cheap though, ~15 bucks and the dealer will install them for free.
- Driver and front passenger door rubber seals both had issues.
- Driver side kept giving me an odd whistling at high speeds
- Top part of the passenger seal near the pointy door corner was warped
- My front genesis badge sticker (ha, sticker... it's the logo inside the wing) half wore off. Entire badge was replaced.
- Windshield wiper washer tubes broke, had to be replaced
- Bluelink went crazy for awhile saying ABS was tripped. Got 20 alerts in a month in Dec 2017. It just went away so not sure what happened...
- Driver side keyless entry stopped working recently... the handle had to be replaced and repainted
I got the CPO extended warranty and the dealer tire protection. Since there are potholes galore, both paid for themselves. I know Hyundai has been improving quality but if you buy Korean, it's a no brainer, get the warranty, especially with all the electronics on the thing.
Edit: In terms of service, the dealer where I bought the car is decent but you have to go the extra mile into "proving" something is wrong. Unless it was something that was physically obvious and 100% happening all the time (ie, keyless entry, and washer tubes). I've had multiple dealers swear on their mother's grave that nothing is wrong with the car and its in tip top shape. I had to jump into the car with them to point out what was going on for more "subjective" repairs like sunroof creaking. There was a tire tread issue that I had to get the shop foreman involved but that was more of a tire issue vs car. and was replaced under the tire warranty
Don't count on getting a Genesis loaner unless you have a generous dealer. I usually get a random Hyundai car. Usually Sonata/Santa Fe (New Santa Fe is decent). I think I've gotten a Genesis loaner once? On the Hyundai branded ones, you can only get them if the dealer happens to have on rotating around their own loaner fleet.