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Service bulletins for the 2020 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.

1020 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
S20080000722020-06-22. Service bulletin. EQUIPMENT:ELECTRICAL; ENGINE. No Crank, Extended Crank To Start, MIL Lamp On
S20080000332020-06-22. Service bulletin. ENGINE; ELECTRICAL SYSTEM:WIRING. MIL Lamp On, DTC P0325 - Knock Sensor 1 Circuit
90042572020-06-22. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. FILTER KIT, Engine Oil When refilling oil on a JT, JL, DT, or RU equipped with a 3.6L Pentastar UPGRADE engine, please be advised that the engine oil capacity is 5 quarts of oil.
07-001-20 REV. A2020-05-26. Service bulletin. ENGINE AND ENGINE COOLING. Water Pump Inlet Tube Fastener Torque This bulletin involves checking the torque on the water pump inlet tube fasteners to possibly eliminate coolant leak at this location. The customer may describe either a coolant leak or the coolant level is low.
07-001-202020-05-26. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. Water Pump Inlet Tube Fastener Torque This bulletin involves checking the torque on the water pump inlet tube fasteners to possibly eliminate coolant leak at this location. The customer may describe either a coolant leak or the coolant level is low.
D-19-20 Rev. B2020-05-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. Fast Feedback Program - 3.0L Diesel Engine and Components - 2020 Ram 1500 (DT) and 2020 Jeep Wrangler (JL) - All Models (Rev. B)
S20180000012020-05-26. Service bulletin. ENGINE AND ENGINE COOLING. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P26FB ? EGR Cooler Bypass Control Stuck Closed Bank 1 Set.
07-001-202020-05-18. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. Water Pump Inlet Tube Fastener Torque This bulletin involves checking the torque on the water pump inlet tube fasteners to possibly eliminate coolant leak at this location. The customer may describe either a coolant leak or the coolant level is low.
D-19-20 Rev. B2020-05-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. Fast Feedback Program - 3.0L Diesel Engine and Components - 2020 Ram 1500 (DT) and 2020 Jeep Wrangler (JL) - All Models (Rev. B)
S20180000012020-05-18. Service bulletin. ENGINE AND ENGINE COOLING. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P26FB ? EGR Cooler Bypass Control Stuck Closed Bank 1 Set.
09-005-202020-04-27. Service bulletin. ENGINE AND ENGINE COOLING. 3.0L Oil Filter Cartridge Identification Differences And Oil Filter Element Servicing Procedure This bulletin outlines the correct procedure for changing an oil filter on a 3.0L diesel to prevent engine damage. The bulletin also highlights the design differences in the oil filter cartridges used in the GEN-2 and GEN-3 3.0L diesel. As well as potential issues that can arise should the incorrect filter be used in each application.
07-001-202020-04-27. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. Water Pump Inlet Tube Fastener Torque This bulletin involves checking the torque on the water pump inlet tube fasteners to possibly eliminate coolant leak at this location. The customer may describe either a coolant leak or the coolant level is low.
90042192020-04-27. Service bulletin. ENGINE AND ENGINE COOLING. PUMP, Water (Water Pump Inlet Tube) For concern of leak at water pump, please check and re-torque water pump inlet tube fasteners as described in Service Bulletin 07-001-20 before replacing the water pump.
90042232020-04-06. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE AND ENGINE COOLING. BATTERY, Auxiliary (180 AMP) Mopar Engineering has reviewed the BBAUA180AA battery due to concerns over fitment in Chrysler, Jeep®, Dodge & Ram vehicles and has provided direction on usage. BBAUA180AA CAN BE USED in the following vehicles equipped with stop/start technology: ?MP ? Jeep Compass ?JL ? Jeep Wrangler ?JT ? Jeep Gladiator ?RU ? Chrysler Pacifica RU NOTE: Modify the BBAUA180AA battery positive mold cover by trimming 3mm of rubber on left side & bottom. ?WK ? Jeep Grand Cherokee ?WD ? Dodge Durango WK/WD NOTE:A vent kit is being created now and will replace the existing tube with a longer one and add an elbow to it for routing (availability is TBD).
D-19-20 Rev. A2020-01-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. Fast Feedback Program - 3.0L Diesel Engine and Components - 2020 Ram 1500 (DT) and 2020 Jeep Wrangler (JL) - All Models (Rev. A)
18-089-192019-12-16. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK
09-003-192019-12-02. Service bulletin. ENGINE AND ENGINE COOLING. GEN-2 and GEN-3 - 3.0L Oil Filter Cartridge Identification Differences This bulletin highlights the design differences in the oil filter cartridges used in the GEN-2, and GEN-3 3.0L diesel. As well as potential issues that can arise should the incorrect filter be used in each application. Although similar in design, the oil filter cartridges used on the GEN-2 and GEN-3 3.0L diesel engines are different in design. Interchanging them may result in premature engine damage over time.
04-001-192019-10-28. Service bulletin. ENGINE. Pentastar Upgrade Oil Fill Level after an Oil Change This bulletin involves rechecking the oil fill level after filling the engine to the correct specifications. The customer may describe that after an oil change they check their oil fill level and it is showing overfilled on the oil dipstick.

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