Jeep Wrangler 2018–2020 — technical service bulletin
Bulletin 0804521 · NHTSA communication 10220967 · issued Mar 23, 2021
Technical service bulletin
communication type
Equipment
component
2018–2020
model years
2
vehicle entries
Official summary
UGQ Radio Enhancements This bulletin involves inspecting and if required updating the radio software to:28.3 - 2018 MY 34.21 - 2020 MY Customers may experience one or more of the following: Intermittently, the radio screen will black out after key is turned on(For 34.21 Only). Navigation screen freezes after a Voice Recognition (VR) command. Warning chime will not turn off. Radio display black, except application bar. Language setting reverting from customer set language to Italian language. Message displayed ?TomTom live services unavailable?. Frequent pop-ups during startup saying device not
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.