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For anyone else on the fence, I just did the upgrade today as well using this and the original post as motivation. I purchased the UConnect for $1362 from moparfactoryparts.com. I tried my employee cost from Dodge directly but they only got down to around $1450 and couldn't promise delivery until possibly next year. I paid a bit more for the USB Hub from eBay because it showed I could receive it this week and the rest were China and a month out. But lo and behold, it now shows Sept 2nd, so they lied to me.

Either way, I have a 2016 Charger with the Harman Kardon option. I install this new unit and it goes about like everyone else reports. I have no heated/cooled seats, no SRT pages, etc. After a minute, the GPS syncs and sets the clock. I turn it off for a few minutes after playing around, and when I turn the ignition back on, the heated/cooled seats now work. I continue playing with things then head home. I notice my Audio doesn't work. I have no BT or FM/AM sound. At this point, I thought I ** up since I had an HK vehicle and this was Panasonic (Alpine?). I get home and decide to put the vehicle to sleep (that is arming the security system, moving the key away and leaving it). After an hour or so, I go out to see if anything has changed. I now have all the SRT pages and my Audio is working. All is good now and I'm happy to have the upgrade! Literally plug and play with some inconvenience waiting for the UConnect to sync with BCM or whatever it's doing.
Oh I just had the same heart attack. I am stepping away to build legos with my son and will check on the car later. Fingers crossed. I left the bezel off just in case I need to remove the radio again.
 
I have a 2017 charger pursuit that I've done the 8.4 swap on, but have continually had issues with my HVAC (A/C only works on max cold, and only seems to blow either max heat or max cold depending on settings). If I replace the BCM with a new one and do the alfaobd flash, do you think this would solve my issues? I've had the same issue with 2 different 8.4 units, so I'm assuming it's an issue with the communication between the BCM and the head unit. Also, am I buying a 2016 new BCM or a 2017? Want to make sure I buy the right thing before I spend the money, I've already sunk a decent chunk of change into this.
 
I have a 2017 charger pursuit that I've done the 8.4 swap on, but have continually had issues with my HVAC (A/C only works on max cold, and only seems to blow either max heat or max cold depending on settings). If I replace the BCM with a new one and do the alfaobd flash, do you think this would solve my issues? I've had the same issue with 2 different 8.4 units, so I'm assuming it's an issue with the communication between the BCM and the head unit. Also, am I buying a 2016 new BCM or a 2017? Want to make sure I buy the right thing before I spend the money, I've already sunk a decent chunk of change into this.
what is the part number of your original unit? I have a display from a 2017 that might work for you. It has CarPlay does yours?
 
I have a 2017 charger pursuit that I've done the 8.4 swap on, but have continually had issues with my HVAC (A/C only works on max cold, and only seems to blow either max heat or max cold depending on settings). If I replace the BCM with a new one and do the alfaobd flash, do you think this would solve my issues? I've had the same issue with 2 different 8.4 units, so I'm assuming it's an issue with the communication between the BCM and the head unit. Also, am I buying a 2016 new BCM or a 2017? Want to make sure I buy the right thing before I spend the money, I've already sunk a decent chunk of change into this.
Does your SRT button work? Reason I ask is when I got my Hellcat they had put a new battery in it. Drove off the lot and the SRT mode wasn't working, the climate controls would go full cold or full hot. Apparently if you disconnect the battery it causes an issue. By holding down the power button and tune/seek on the radio controls for 10 seconds it gave me all these controls back.
 
what is the part number of your original unit? I have a display from a 2017 that might work for you. It has CarPlay does yours?
Don't have the part number offhand but its the small (5"?) head unit that came stock on Charger Pursuits at that time. Both 8.4" head units I purchased are carplay enabled and work flawlessly, which is why I'm thinking it's the issue between the head unit and the BCM not aligning properly.
 
Does your SRT button work? Reason I ask is when I got my Hellcat they had put a new battery in it. Drove off the lot and the SRT mode wasn't working, the climate controls would go full cold or full hot. Apparently if you disconnect the battery it causes an issue. By holding down the power button and tune/seek on the radio controls for 10 seconds it gave me all these controls back.
It's a Charger Pursuit so no SRT button for me, but I'll give the power/tune button combo a try and will see what happens.
 
Without reading multiple pages, has the I/C temp (--) guage been fixed as well as the launch control being stuck 1K?
 
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