Owned my JGCL Limited since December 2021, no issues whatsoever. Guess I am lucky; and you all have lemons. But with all new model vehicles it is a toss of a coin. It is my rule to buy full coverage on new models. All my vehicles had issues due to the first year's models; except the 2021 JGCL. There is no excuse, but issues happen. Hope you all get issues worked out or exchange the model.
The problem isn't the warranty coverage; It's the fact that Jeep absolutely cannot make the vehicles work right. The first time I brought mine in for repairs, the tech saw a few error codes, but fixed nothing that I can recall. The next time I brought it in, he had a new scan tool Jeep had provided and advised was specifically to be used with the WL platform. He was shocked when it pulled up FAR more error codes, in a much wider array of modules. That was over six months after they started delivering these vehicles.
They ultimately, several months later, replaced my UConnect screen, which had almost no functionality anymore (no phone/FM/Nav/XM/Carplay/BT/etc etc etc for MONTHS). Now, the screen doesn't flash very often anymore, but I've got about a 50% chance of being able to use my phone for calls or music via wired or wireless CarPlay. Lower odds if there are other phones in the car. The McIntosh Audio system was a major decision point for me over the diesel Tahoe with the mediocre Bose system, and I can't even listen to music in the POS half the time. I still have a multitude of totally random electrical issues and other flaws (see attached). They have not fully repaired anything aside from installing new headlights, which weren't even aimed properly, FFS.
I had expected a few teething issues with a first model year, but mine seems to have some sort of root electrical flaw that is causing all manner of random electrical errors. My ex-wife's brand new 2003 Bentley Continental GT, which was like the sixth one in the US back then, didn't have a single problem, ever. As a long time Audi owner (same company) I was shocked. For a mass production car like the Grand Cherokee, the number of problems they sprayed out of those factories in the '21 MY is appalling. I've read elsewhere that they have, in the past couple of months, stopped offering buybacks as a result. The situation is THAT bad. They're apparently just ghosting people they were already working with and making promises to, like me. Head in sand, fingers in ears "I CAN'T HEAR YOU" is evidently their official customer support policy, presumably because they've lost so much money on this.
A good friend of mine who recently retired from a major tech/safety systems supplier saw my car, and upon hearing my experience, told me "FCA was widely regarded as the absolute worst manufacturer with regard to competently integrating third party technology. They do almost no in-house development, and their engineers treat these systems like simple legos, expecting they can just plug them in and go, when nothing could be further from the truth. They don't even know how to do the development and testing, and end up having to figure out things years into production because they're sending out half baked products, and YOU are the beta tester. And when things don't work right, it takes them a long time and a lot of handholding to figure things out."
This is from a long time, deeply experienced expert who lead teams for the Apple and Google cars, in addition to just about every other major manufacturer. Night vision, self driving, all manner of crash/safety systems... he's been on the inside, responsible for developing all of those systems.
From what I'm seeing, the '22 and '23 model years seem to be significantly more problem-free, although time will tell. Read the attached PDF, and consider yourself extremely lucky, as a '21 owner, because when things go wrong, Jeep can't fix it, and they will promise you the moon, only to about-face and totally abandon all of their promises. The nice thing is, lemon law lawyers are generally 'free' to the plaintiff. So there's that, I guess.