
A Technical Service Bulletin (TSB 08-394-25) addresses Malfunction Indicator Lamp (MIL) illumination and the Diagnostic Trouble Code (DTC) B1E21-96 in 2024-2026 Stellantis vehicles. This indicates a Telematics Box Module (TBM) backup battery component internal failure, often accompanied by a…

This manufacturer communication (NHTSA ID 11026660) details a common issue in 2019-2026 Stellantis vehicles where a 'Battery of Uconnect Box requires service' message appears, accompanied by DTC B1E21-96. The fix involves replacing the internal battery of the Telematics Box Module (TBM), not the…

Stellantis TSB 08-394-25 addresses Telematics Box Module (TBM) backup battery failures, identified by DTC B1E21-96. This can cause a 'Battery of Uconnect Box requires service' message in 2019-2026 Alfa Romeo, Dodge, Jeep, and RAM vehicles.
I have not even 1000 miles on my new Tonale and my infotainment shuts down due to excessive heat. Service was authorized to install a new one and the same thing is happening. No back up camera, navigation or infotainment screen . It says too hot and shuts down. I am in Miami and I have virtually no system as it is not functioning. It's burning to the touch. I am offered no assistance and am told it is functioning as described . There is no cameras no navigation. I am In a rental car.
No injuries · No fire · No crash