WenmarOpen by Wenmar Pro

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

Bulletins, newest first
08-109-202021-03-01. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. UGQ Radio Enhancements This bulletin involves inspecting and if required updating the radio software to: 39.3 Customers may experience the following:CarPlay® audio does not mute during an active Ecall.
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.
S20250000082021-03-01. Service bulletin. FUEL SYSTEM, DIESEL; EQUIPMENT. Excessive Diesel Exhaust Fluid (DEF) Consumption.
S20080001962021-03-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. Diagnostic Trouble Code (DTC) P065A ? Generator System Performance, Additional Information.
718382021-02-16. Service bulletin. VISIBILITY. Warranty Bulletin D-18-16 Rev. B Mopar Windshield Made With Corning Gorilla Glass (Rev. B)
720262021-02-16. Service bulletin. POWER TRAIN. Warranty Bulletin D-21-01 Fast Feedback Program? Transmission, Front and Rear Axles/Prop Shafts, Front-End Accessory Drive (FEAD), Catalytic Converters and Exhaust Components, Cooling, Fuel and EVAP System Components and Electrical and EPT System Components - 2021 Jeep Wrangler 4xe (JL)
S21230000042021-02-16. Service bulletin. WHEELS. Front Wheel Well Liner Contacting Tire And Or Loose
S2023000041 Rev.2021-02-16. Service bulletin. TRAILER HITCHES. MOPAR Trailer Brake Accessory Kit And Instructions
S21080000232021-02-16. Service bulletin. LANE DEPARTURE: BLIND SPOT DETECTION. Blind Spot Sensor Light Operate Sporadically And Indicates False Detection Without Any DTC
S21250000012021-02-16. Service bulletin. ENGINE AND ENGINE COOLING. High Pressure (HP) Exhaust Gas Recirculation (EGR) Cooler, Perceived Internal Coolant Leak.
S21080000172021-02-16. Service bulletin. EXTERIOR LIGHTING. Auto High Beams Do Not Operate
S21230000032021-02-16. Service bulletin. STRUCTURE. Buzz Squeak Rattle From Floor Dash And Interior Items
S21190000012021-02-16. Service bulletin. STEERING. Click Pop Creak Noise While Turning Steering Wheel
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
S2008000031 Rev.2021-02-16. Service bulletin. EQUIPMENT. Low Charging Voltage Displayed On Cluster
S21230000022021-02-16. Service bulletin. VISIBILITY. Exterior Rearview Mirrors Inoperative And Or Intermittent Operation.
90043452021-02-16. Service bulletin. ENGINE AND ENGINE COOLING. COOLER, EGR If you are replacing the high pressure EGR cooler (p/n 68490113A$) for a suspected internal coolant leak that was detected by wetness in the EGR pipe or valve, please perform proper cooling system pressure test first to verify the leak. Refer to all published service information regarding Cooling Diagnosis and Testing (LEAK TESTING) before proceeding.
90043432021-02-16. Service bulletin. SERVICE BRAKES, HYDRAULIC. VALVE, HIGH PRESSURE EGR If you are replacing the high pressure EGR valve (68490212A$) due to DTC P0407 or P0408 please refer to all published service information regarding proper diagnosis before proceeding. These DTCs are for the low pressure EGR system.
90043422021-02-16. Service bulletin. VISIBILITY. WINDSHIELD Windshield cracked or blemish. When customer comes in for a cracked windshield, please note the location of crack and take pictures before repair. Please send pictures to FCA Redacted Content or load to the warranty claims system.
S20080001802020-12-28. Service bulletin. VISIBILITY; VISIBILITY:REAR WINDOW WIPER/WASHER. Rear Wipers Do Not Park Correctly After Rear Wiper Swipe Operation
S20080001792020-12-28. Service bulletin. ELECTRICAL SYSTEM. Headlamp Switch Dimmer Switch Controls Cannot Control Interior Ambient Lighting
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.
S20230000412020-12-28. Service bulletin. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL. MOPAR Trailer Brake Accessory Kit And Instructions
S20080001722020-12-28. Service bulletin. ELECTRICAL SYSTEM. Radio Screen Flickering When Using Apple CarPlay Or Android Auto.

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