Jeep Grand Cherokee 2021–2023 — technical service bulletin
Bulletin 08-237-25 REV. A · NHTSA communication 11023581 · issued Sep 25, 2025
Technical service bulletin
communication type
Electrical System
component
2021–2023
model years
9
vehicle entries
Official summary
Not applicable to vehicles built for US market. R1H Radio U40.20 USB Software Update Customers may experience one or more of the following: ● **Temperature displayed in the radio display and rear HVAC are mismatched.** ● Wi-fi Software update pop-up is being triggered in non connected vehicles. ● Radio freezes and then restarts. ● Head Unit (HU) freezes and then restarts. ● HU is taking more than one minute to start after starting the engine. ● System displays blank screen in E-Hybrid tab when user switched to dark theme mode. Rearview Camera (RVC) functions normally. This bulletin involves in
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.