Uconnect screen delamination and ghost-touchmajor
The 2018's signature electrical complaint. The Uconnect radio screen delaminates — the top edge bubbles and separates — and then 'ghost-touches': owners report the screen randomly calling contacts and even 911, switching climate from A/C to heat, changing map directions, and eventually going completely black, taking the backup camera and climate controls with it. One owner was quoted about $1,700 out of warranty for a 'known issue' the dealer wouldn't cover. There is no recall for the delamination itself; inspect the screen edge and test that it responds cleanly and shows the reverse camera before buying.
Sources: NHTSA complaint database, 2018 Jeep Grand Cherokee · Independent mechanic channel transcripts (WK2 Grand Cherokee, incl. 3.6L valvetrain teardown)
~$1,700
Infotainment/screen replacement (one owner quote)