NHTSA Service Bulletin 11027845: 2021-2025 Jeep Grand Cherokee
Official manufacturer communication context for 2021-2025 Jeep Grand Cherokee, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
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-
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 11027845?
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 a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
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