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Service bulletins for the 2021 Jeep Grand Cherokee

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.

1325 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
90044382021-12-13. Service bulletin. ELECTRICAL SYSTEM. MODULE, Central ADAS Decision, Mid/Long Range Radar For mid-range corner and long range front radars, do not replace all radar's for "blind spot inop" in Cluster EVIC. For any radar loss of communication (LOC), short to ground/open circuit or short to battery, first attempt to reflash radars/CADM, then verify all wiring continuity back to the CADM if the flash fails to correct. If the problem persists, replace ONLY the specific radar in question as defined in the service procedure. NOTE: Radars cannot be A-B swapped to different positions in the vehicle for troubleshooting. Please contact FCA Redacted Content with questions/concerns. If no response in 15 minutes, proceed with repair.
09-007-212021-06-28. Service bulletin. ENGINE. 6.2L Engine Oil Temperature Sensor Leak This bulletin involves re-torquing the oil temperature sensor to specification. Customers may notice a slight oil leak from under the vehicle near the oil temperature sensor location
08-090-212021-06-28. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. UKG Radio Enhancements This bulletin involves updating the radio software level to 2036.07. Customers may experience one or more of the following:Screen flickering. Carplay audio does not always resume. In addition, the following software enhancements are available:Apple certification enhancements. Google certification enhancements.
08-088-212021-06-28. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS. Radio Enhancements This bulletin involves updating the radio software level to 2036.06. Customers may experience the following:Product plan UUID is not correct in Carplay®. Carplay audio does not always resume. Battery save vs. Battery Charge toggles back to Battery Charge after sleep cycle. When ?Charge Now? is selected on key-off outside of the charging schedule ? it does nothing. In addition, the following enhancements are included:Update power supply source from 1 amp to 2.1 amps. GOOGLE® certification enhancements - screen flickers
08-074-212021-06-28. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. UGQ, UGV, UJV and UJQ Radio Enhancements This bulletin involves inspecting the software level to see if the radio needs oneor two USB flash drive(s) to update the radio software level to 39.2. Customers may experience one or more of the following: Voice recognition (VR) fails while road names are written in Catalan. After the update to software level MR-28.31, the Amperometer inside Jeepskills shows values too high. The radio may lose some or all programmed presets. Volume blocked/uncontrollable. Heating Steering wheel and seat SK greyed out. Eco Drive trips saved issue. Radio may reset, turn itself off and then back on again. Radio display screen lock up. Park assist chime will continue to chime after the vehicle is turned off. Frequent pop-ups during startup saying device not connected - Uconnect LIVE. Radio will display the incorrect speed limit in kph when approaching a roadspeed camera(2018 WK Only). Uconnect Live Apps restricted to only MyCar, ecoDrive and Jeep Skills(2018 WK Only). Russian language missing in the radio setting menu(2018 WK with UGQ Only). If the radio is set for Russian language, UConnect displays unknown symbolson the ?Off Road Page?(2018 WK with UGQ Only). Could not disable the feature for the heated seat and heated steering wheelturned on automatically at startup(2018 WK with UGQ Only). In addition the following enhancements are included: Navigation improvements. Bluetooth improvements. VR improvements. Russian language enhancements (2018 WK with UGQ Only)
08-075-212021-06-28. Service bulletin. ELECTRICAL SYSTEM. Flash: Amplifier (AMP) Diagnostic and System Updates This bulletin involves reprogramming the AMP with the latest available software. The following software enhancement is available: Amplifier update to eliminate static noise from the instrument panel mounted speakers.
S2123000035 Rev.2021-06-28. Service bulletin. SEATS. B1F2A-77, B1F29-77, B1F28-77, B1F2B-77 3rd Row Seat Recline Motor DTC ?s
S2108000127 Rev.2021-06-28. Service bulletin. EQUIPMENT. Radio Reboot Continually
S21080001312021-06-28. Service bulletin. ELECTRICAL SYSTEM. One Or More Passive Entry Antenna General Electric Failure DTC?s Found In The RFH
S21080001292021-06-28. Service bulletin. ELECTRICAL SYSTEM. The Ignition State Does Not Change When The Start/Stop Button Is Pressed
S21240000102021-06-28. Service bulletin. ENGINE AND ENGINE COOLING. Blower Motor Noisy When Running System On Max. Blower Changes Speeds Without Customer Input.
S21240000092021-06-28. Service bulletin. EQUIPMENT. Whistle Noise Heard When Operating AC
S21240000082021-06-28. Service bulletin. VISIBILITY. Poor Airflow From 2nd Or 3rd Row Vent Outlets
S21080001282021-06-28. Service bulletin. TIRES. C151D-00 Tire Pressure Sensor Location Undetermined DTC set
S21080001272021-06-28. Service bulletin. EQUIPMENT. Radio Reboot Continually
S21230000392021-06-28. Service bulletin. STRUCTURE. Click Pop Snap Noise From Door Area On Rough Roads Or Body Twist
S21230000382021-06-28. Service bulletin. LATCHES/LOCKS/LINKAGES. Click Snap Noises Opening Or Closing Door
S21230000372021-06-28. Service bulletin. VISIBILITY. Dual Pane Sunroof Sunshade Noisy When Operating
S21230000362021-06-28. Service bulletin. VISIBILITY. Dual Pane Sunroof Glass False Reversing When Closing
S21080001252021-06-28. Service bulletin. ELECTRICAL SYSTEM. Battery Of Uconnect Box Is Temporarily Low Popup Message
S21180000092021-06-28. Service bulletin. ENGINE AND ENGINE COOLING. Customer complains of a MIL-on condition. Upon further inspection, there is a Diagnostic Trouble Code (DTC) P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) set in the PCM.
S21080001232021-06-28. Service bulletin. ELECTRICAL SYSTEM. Stored U0080-00 DTC Code Ethernet Bus 1 Fault Set By SGW
S21080001192021-06-28. Service bulletin. EQUIPMENT. Apple CarPlay Malfunctioning, Does Not Launch Or Is Cutting In An Out On Wired And Wireless Connection, Radio Stuck When IPhone Is Connected
S2008000010 Rev.2021-06-28. Service bulletin. ELECTRICAL SYSTEM. Apple Carplay Inoperative Or Not Working, Phone Not Pairing, Carplay Lockup, Freeze or Audio Concerns
S21050000032021-06-28. Service bulletin. EXTERIOR LIGHTING:BRAKE LIGHTS. C1009 Brake Fluid Low DTC Red Brake Light On

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.