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Service bulletins for the 2021 Jeep Wrangler

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.

1062 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
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.
S21180000072021-06-28. Service bulletin. ENGINE AND ENGINE COOLING. MIL Lamp On DTC P1CEA BOOST SIDE EVAP PURGE SYSTEM PERFORMANCE
S21140000022021-06-28. Service bulletin. ENGINE AND ENGINE COOLING. CEL (Check Engine Lamp) On Shortly After Filling Vehicle
S21230000202021-05-24. Service bulletin. BACK OVER PREVENTION; ENGINE AND ENGINE COOLING. A Buzz, Squeak, Rattle (BSR), Clicking Noise Heard From Left Side Of The Freedom Top.
90041042021-05-24. Service bulletin. ENGINE AND ENGINE COOLING. Valve Cover & Gasket Engineering is looking for information on the Pentastar valve cover due to gasket oil leaks. Please review the valve cover for a white paint dot/mark directly between the 2 cam actuators on the front of the valve cover. If found, please contact the following engineers for further information FCA Redacted Content, or FCA Redacted Content If no response in 15 minutes, proceed with repair.
S1809000007 Rev.2021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. Customer complaint may include engine oil leak/consumption.
S21080000642021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. Appearance Of A Coolant Leak On The Power Pack Unit (PPU) Fitting Due To Assembly Lubricant
90033572021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter (Pentastar V6) All vehicles equipped with a 3.2L or 3.6L except for model year 2014 vehicles with leak concern: 1) Ensure the Oil Filter Adapter (OFA) Cap O-ring is seated in the proper groove in the cap and not damaged or cut. 2) If replacing the (OFA) due to a leak detected between (OFA) and block. Ensure the torque on the 5 bolts are torqued to 12nm. If not record the actual values, torque to 12nm and contact the FCA employees listed below. 3) Remove the (OFA) and replace the O-ring and gaskets only (Kit #68191356A$), NOT THE OFA. 4) If oil was drained, add oil dye to ensure the leak is repaired. For model year 2014 vehicles replace the Oil Filter Adaptor. 5) When replacing PN's 68310865A$ & 68308741A$, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
90043552021-04-26. Service bulletin. ENGINE AND ENGINE COOLING. ENGINE, Complete If you are replacing the 3.0L Diesel engine assembly due to internal failure, the Diesel Engineering team is requesting more information regarding the repair. Please provide the following information to FCA Redacted Content and proceed with engine order. -Vehicle VIN -Vehicle Mileage -Symptoms and reason for engine replacement -STAR case # (if applicable) Someone from the Diesel Engineering team may respond back with further questions, requests for pictures, or provide a Fast track number if the symptomatic engine needs further analysis.
S21140000012021-03-15. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Humming/Buzzing Noise From Under The Hood With The Key Off.
S21080000302021-03-15. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:STARTER ASSEMBLY. No Crank, No Start
09-013-20 REV. A2021-03-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:IGNITION:COIL:SPARK PLUGS; ENGINE. 3.6L Pentastar Upgrade Spark Plug Internal Crack This bulletin involves replacing all six spark plugs. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. Customers may also comment on the following:Rough running engine.
09-013-202021-03-01. Service bulletin. ENGINE; EQUIPMENT; ELECTRICAL SYSTEM. 3.6L Pentastar Upgrade Spark Plug Internal Crack This bulletin involves replacing all six spark plugs. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. Customers may also comment on the following: Rough running engine.
S21250000012021-02-16. Service bulletin. ENGINE AND ENGINE COOLING. High Pressure (HP) Exhaust Gas Recirculation (EGR) Cooler, Perceived Internal Coolant Leak.
S21080000142021-02-16. Service bulletin. ENGINE AND ENGINE COOLING. Check Engine Light On, Service Shifter Message, No Crank No Start. Transmission Wiring Harness Chaffed Or Pinched Near Exhaust DPF
90043452021-02-16. Service bulletin. ENGINE AND ENGINE COOLING. COOLER, EGR If you are replacing the high pressure EGR cooler (p/n 68490113A$) for a suspected internal coolant leak that was detected by wetness in the EGR pipe or valve, please perform proper cooling system pressure test first to verify the leak. Refer to all published service information regarding Cooling Diagnosis and Testing (LEAK TESTING) before proceeding.
S20090000042020-12-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION: OIL COOLER. Oil Leak Between The Engine Oil Cooler/Filter Housing, And The Engine Block.
S1625000005 Rev.2020-12-28. Service bulletin. EQUIPMENT; FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. (Rev. A) Malfunction Indicator Light (MIL) Illuminated. Service Diesel Exhaust Fluid (DEF) System ? See Dealer Soon Message on Electronic Vehicle Information Center (EVIC) Along With Possible Diagnostic Trouble Code (DTC) P241D - SCR Inducement - Forced Engine Shutdown.
S20180000122020-12-28. Service bulletin. ELECTRICAL SYSTEM; ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Check engine lamp on. Fault code P0244- TURBOCHARGER/SUPERCHARGER WASTEGATE SOLENOID "A" RANGE/PERFORMANCE is set in the Powertrain Control Module (PCM a.k.a. ECM) after the turbocharger assembly has been replaced.
90043332020-12-28. Service bulletin. ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter If you are replacing the oil cooler/filter housing for an oil leak that appears to be between the cooler, and the engine block, please refer to all published service information regarding proper diagnosis of oil leaks in this area before proceeding. If all proper diagnosis has been performed, and there is still an active leak, please replace the oil cooler/filter housing gasket (pn# 68505111A$) first before replacing the housing.
S20090000042020-12-21. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. Oil Leak Between The Engine Oil Cooler/Filter Housing, And The Engine Block.
S1925000008 Rev.2020-12-21. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE; FUEL SYSTEM, DIESEL. (Rev. B) Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P20E8 ? Reductant Pressure Too Low and/or P208B ? Reductant Pump 1 Control Performance Set.
S1625000005 Rev.2020-12-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. (Rev. A) Malfunction Indicator Light (MIL) Illuminated. Service Diesel Exhaust Fluid (DEF) System ? See Dealer Soon Message on Electronic Vehicle Information Center (EVIC) Along With Possible Diagnostic Trouble Code (DTC) P241D - SCR Inducement - Forced Engine Shutdown.
S20180000122020-12-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Check engine lamp on. Fault code P0244- TURBOCHARGER/SUPERCHARGER WASTEGATE SOLENOID "A" RANGE/PERFORMANCE is set in the Powertrain Control Module (PCM a.k.a. ECM) after the turbocharger assembly has been replaced.
90043332020-12-21. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. ADAPTER, Engine Oil Filter If you are replacing the oil cooler/filter housing for an oil leak that appears to be between the cooler, and the engine block, please refer to all published service information regarding proper diagnosis of oil leaks in this area before proceeding. If all proper diagnosis has been performed, and there is still an active leak, please replace the oil cooler/filter housing gasket (pn# 68505111A$) first before replacing the housing.

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