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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

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
S23230000312023-05-30. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Buzz, Squeak, Rattle (BSR) From Under Vehicle While Driving.
9003357a2023-04-17. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter (Pentastar V6) For all 2014MY replace the Oil Filter Adapter (OFA). For any other MY review and follow instructions from the latest STAR Online S1809000007 available on Dealer Connect. Also, consider the following: 1) Remove OFA 2) Replace only the oil inlet O-ring and gaskets (seals kit in SOL above). 3) Re-install the OFA. For 2023MY and beyond use black O-ring. For 2022MY and prior use red O-ring. Note: When replacing OFA, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
90033572023-04-17. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter (Pentastar V6) For all 2014MY replace the Oil Filter Adapter (OFA). For any other MY (with mileage above 30,000) review and follow instructions from STAR Online S1809000007 REV. C available on Dealer Connect. Also, consider the following: 1) Remove OFA 2) Replace only the oil inlet O-ring and gaskets (seals kit in SOL above). 3) Re-install the OFA. For 2023MY and beyond use black O-ring. For 2022MY and prior use red O-ring. Note: When replacing OFA, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
S2109000007a2023-01-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. Complaint may include low engine oil level and/or engine oil seep leak from engine oil drain plug.
S21090000082023-01-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION: OIL COOLER. Oil Level Check Procedure
S21090000072023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. Complaint may include low engine oil level and/or engine oil seep leak from engine oil drain plug.
S21090000042023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. Issue involves overheating, running hot, coolant leaks and related symptoms after a Mopar replacement engine has been installed in the vehicle.
90043902023-01-17. Service bulletin. STRUCTURE; ENGINE. COVER, Engine For WL equipped with 3.6L engines, the Limited and Laredo trim lines are not equipped from the factory with an engine cover. Overland and Summit are equipped from the factory with an engine cover. Engine cover installation is not reimbursable on a shortage and error claim on Limited and Laredo trim levels.
09007212023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. 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
S2123000035-12023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. B1F2A-77, B1F29-77, B1F28-77, B1F2B-77 3rd Row Seat Recline Motor DTC ?s
S21240000102023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. Blower Motor Noisy When Running System On Max. Blower Changes Speeds Without Customer Input.
S21180000092023-01-17. 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.
S18090000072023-01-17. Service bulletin. ENGINE. Customer Complaint May Include Engine Oil Leak Or Consumption
0804322-12023-01-09. Service bulletin. ENGINE AND ENGINE COOLING; VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following:High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar 1-2 and rear airflow at blower bar 5-7.
0804322-22023-01-09. Service bulletin. ENGINE AND ENGINE COOLING; VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following:High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar 1-2 and rear airflow at blower bar 5-7
S22080000732023-01-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). No Start, After Flash And Or PCM Replace, DTC P0513 Invalid Skim Key Setting
S22240000032023-01-09. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. AC Does Not Blow Cold (Rev. A not indicated on final document)
TSB08043222023-01-09. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. AC Does Not Blow Cold
S22080000642023-01-09. Service bulletin. AIR BAGS; ENGINE AND ENGINE COOLING. Check Engine Light Is On. P0480 Cooling Fan 1 Control Circuit/Open
S22090000022023-01-09. Service bulletin. ENGINE. Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. When performing diagnosis, an internal engine concern may be suspected.
07003222022-12-19. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Coolant Charge Air Cooler Pump Associated To Low Coolant Level or Diagnostic Trouble Codes
S22090000042022-12-19. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. If a Mopar oil filter is not available, use a filter that meets or exceeds USCAR36 specification and is compatible with semi and full synthetic oils.
09012222022-12-12. Service bulletin. ENGINE AND ENGINE COOLING. Spark Knock/Engine Symptoms This bulletin involves cleaning the piston heads and cylinder head combustion chambersto resolve a spark knock condition being caused by oil intrusion through the PCV system. The customer may describe a knocking or pinging noise coming from the engine upon acceleration.
91000822022-11-07. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; WHEELS; EQUIPMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:STARTER ASSEMBLY:SOLENOID. STARTER, Engine Prior to starter removal: 1. Inspect and check all connections to the starter motor solenoid a. Unplug and plug-in the T50 1-way connector as needed to verify the connection is good & tight and check for any bent pin in the connection. b. Inspect the T30 connection (i.e. B+ M8 threaded stud & nut) for tightness to assure cable ring terminal connection is secured and tight (use torque spec per service manual). 2. Check/verify all grounds in the cranking circuit a. Check tightness of mounting bolts that secure starter to the engine block b. Check main ground from engine to chassis c. Check battery ground cable connections are clean and tight d.Potentially, loosen both starter motor bolts, without removing, and re-tighten to torque specifications in the service manual e. After all steps above are complete, attempt to crank the engine to verify if improvement has been made (i.e. the steps fixed the customer complaint) 3. Conduct the voltage drop test (starter feed circuit) per the service manual before removing the starter motor 4. Starter Removal: conduct the removal if above steps do not fix the complaint a. Conduct bench test by applying 12 volts to motor T30 and T50 connections (i.e. conduct simple free speed test) b. Free speed test should result in starter motor pinion travel to pinion stop and rotation with normal rotational noise (i.e. no grinding, scrapping, etc.) c. If any abnormal noise is present, replace the starter motor 5. During starter removal, also remove and replace the two starter mounting bolts. Return the bolts with starter motor for analysis at QEC and the supplier warranty analysis lab.
S2123000035RevA2022-10-17. Service bulletin. ENGINE AND ENGINE COOLING; SEATS:MID/REAR ASSEMBLY:SEAT HEATER/COOLER. B1F2A-77, B1F29-77, B1F28-77, B1F2B-77 3rd Row Seat Recline Motor DTC ?s

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