{"nhtsa_id":11023581,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-10-02","date":"2025-09-25","document_id":"08-237-25 REV. A","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"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 inspecting and if required, updating the radio software level to **U40.20**. Depending on the radio’s current software level the radio may need a one or two step USB update","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023581-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023581-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11023581","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2021,"year_to":2023,"match":"exact","vehicle_ids":["2021_jeep_grand-cherokee","2022_jeep_grand-cherokee","2023_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE 4XE","year_from":2021,"year_to":2023,"match":"base","vehicle_ids":["2021_jeep_grand-cherokee","2022_jeep_grand-cherokee","2023_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE L","year_from":2021,"year_to":2023,"match":"exact","vehicle_ids":["2021_jeep_grand-cherokee-l","2022_jeep_grand-cherokee-l","2023_jeep_grand-cherokee-l"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}