It might help to document every interaction you’ve had with the dealer and Stellantis, showing your persistence in addressing the problem.
One option you could consider is reaching out to a different Jeep dealership. Sometimes, a fresh set of eyes can make a difference, and they may have more insight or a different approach to diagnosing electrical issues. You might also want to check if there are any active recalls or technical service bulletins (TSBs) related to your radio unit in the 2018 JL Sahara.
I hope you can find a solution soon; it’s tough to enjoy your Jeep when the radio's giving you problems. Keep us updated on your progress!
