{"nhtsa_id":11027845,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-01-28","date":"2026-01-23","document_id":"08-014-26","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 - Korea Customers may experience one or more of the following: ● T-maps navigation feature is intermittently not available due to map loading. ● When the navigation speed alarm margin is set and the while driving the vehicle between the speed limit and the set margin, the navigation speed alarm will sound off continuously and the user is unable to control the volume. ● After setting a navigation destination and then the customer is following the navigation route, the navigation system will stop operating. ● Navigation touch screen menu is inoperable after setting a navigation destination. The home screen widget will be black and the navigation display map will no longer show the navigation route. ● WI-FI software update pop up is being triggered in non connected vehicles. ● Vehicle Forward Collision Warning must have two options: OFF / Warning + Active Braking. ● Temperature shows at upper left and right of center display highlights opposite side of what temperature hard switch is pressed. Affects Right Hand Drive RHD only. ● With ignition on and radio on, the radio display freezes then restarts (Rearview Camera (RVC) functions normally). ● Radio is taking more than one minute to start after starting the engine (RVC functions normally). ● System displays a blank screen in E-Hybrid tab when user switches into dark-theme mode (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 USB update. M08 FSAR-RSU-6722 -2-","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11027845-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11027845-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11027845","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2021,"year_to":2025,"match":"exact","vehicle_ids":["2021_jeep_grand-cherokee","2022_jeep_grand-cherokee","2023_jeep_grand-cherokee","2024_jeep_grand-cherokee","2025_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE 4XE","year_from":2021,"year_to":2025,"match":"base","vehicle_ids":["2021_jeep_grand-cherokee","2022_jeep_grand-cherokee","2023_jeep_grand-cherokee","2024_jeep_grand-cherokee","2025_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE L","year_from":2021,"year_to":2025,"match":"exact","vehicle_ids":["2021_jeep_grand-cherokee-l","2022_jeep_grand-cherokee-l","2023_jeep_grand-cherokee-l","2024_jeep_grand-cherokee-l","2025_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":[]}