I have a USA 2025 IONIQ 5 Limited and iPhone 16 Pro with a paired Apple Watch 10. Creation and use of the new "Digital Key 2" features with my iPhone went fine using the MyHyundai app procedure (Menu / Digital Key). For days, I was then unsuccessful trying multiple variations following the rest of Hyundai's steps to also get the digital key onto my Apple Watch -- but this morning I figured-out an easy workaround. Here it is:
Symptom: After following and receiving confirmation that a new digital key has been created for your iPhone, and then optionally linked to your IONIQ 5 Profile (which make a lot of sense to do), a screen indicating "Add Hyundai Key to Watch" is presented on your iPhone with a "Continue" button (see image below). When that is selected, either a generic Error popup that makes no sense, or message 4203 "Please restart the vehicle and wait a few minutes..." appears (screenshots attached.) Even if you turn your car off/on and wait e.g. 10 minutes before trying to start pairing your watch again, the app procedure fails with one of the same messages.
Workaround:
Good luck!
Symptom: After following and receiving confirmation that a new digital key has been created for your iPhone, and then optionally linked to your IONIQ 5 Profile (which make a lot of sense to do), a screen indicating "Add Hyundai Key to Watch" is presented on your iPhone with a "Continue" button (see image below). When that is selected, either a generic Error popup that makes no sense, or message 4203 "Please restart the vehicle and wait a few minutes..." appears (screenshots attached.) Even if you turn your car off/on and wait e.g. 10 minutes before trying to start pairing your watch again, the app procedure fails with one of the same messages.
Workaround:
- Follow the MyHyundai app procedure (Menu / Digital Key) to add your iPhone and optionally connect to your IONIQ 5 Profile
- Once that is complete and you have verified your digital key is operational, on your iPhone
- Open the Apple Watch app
- Scroll down to "Wallet & Apple Pay" and select it
- You should see your "Hyundai IONIQ 5" card as available with an "Add" button
- Select "Add" to add the digital key into your Apple Watch Wallet
- Scroll down to "Wallet & Apple Pay" and select it
- Open the Apple Watch app
- You should be good to go with both Apple devices at this point. I am, with full functionality. To also confirm, when you go back to the MyHyundai App and look at Digital Key status, you'll see that the Apple Watch has a shared key, no different than e.g. if you had added your partner's phone, and it shows up as a shared key in the IC as it should.
Good luck!


