Jeep Grand Cherokee 2021–2024 — technical service bulletin

Bulletin 08-266-25 REV. A · NHTSA communication 11023582 · issued Sep 25, 2025

Technical service bulletin

communication type

Electrical System

component

2021–2024

model years

vehicle entries

Official 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. ●

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.