Wireless CarPlay requires specific hardware (Wi-Fi chipset) not present in Uconnect 4C systems. Only Uconnect 5 (2021+) supports wireless projection.
Once the progress reaches 100%, the Uconnect system will reboot normally and display your standard home screen.
Dealerships only apply manufacturer-recommended updates when you report a specific issue. If your radio is working fine, they will not proactively update it. Tell them you experience Bluetooth disconnects and reference TSB 08-146-18 to compel them to install 18.45.01.
Once finished, the screen will reboot back to the normal radio display. Remove the USB drive. Troubleshooting Common Update Failures Error: "File Not Supported" or "No Files Found" Uconnect Software Version 18.45.01
Compatibility and vehicle-specific considerations Uconnect releases are often tailored or limited by vehicle model, model year, and hardware generation. Not all vehicles running the same major software generation (18.x) will receive identical feature sets or identical patch contents. Owners should check compatibility against their vehicle’s VIN, model year, and head-unit hardware revision. Dealerships typically have access to the official release notes and can confirm whether a given vehicle qualifies for the update.
: Prevents incorrect date and time displays caused by the 2019 GPS rollover. Navigation Accuracy
The update takes roughly 20–45 minutes to complete, during which the vehicle should be in the "Run" position with the engine off or idling to ensure consistent power. Challenges and "Bricking" Risks Once finished, the screen will reboot back to
Ensures the rear-view camera feed displays instantly when shifting into reverse, minimizing dangerous screen lag.
This is a common problem. Since the Uconnect website uses your VIN to determine your vehicle's factory configuration, it will not show updates for an aftermarket radio. You will need to find the update files from other owners or aftermarket sources.
System stability and performance
Turn off the vehicle, open and close the driver’s door to kill retained accessory power, and let the vehicle sit completely off for 5 minutes to let the modules fully power down and register the new software. Troubleshooting Common Installation Issues
Not every Uconnect configuration utilizes this update. It is highly specific to third-generation architecture. You can verify your current version by navigating to your screen's and checking System Information . Specification Details Release Date October 09, 2019 Sales Codes RA3 (8.4A) or RA4 (8.4AN) Vehicle Markets United States / North America (FOTA and USB) Key Pre-requisite