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Service bulletins for the 2021 Ram 1500

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.

1129 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
1106002026-03-13. Service bulletin. ELECTRICAL SYSTEM. SPEAKER - NONE
S26210000032026-03-05. Service bulletin. POWER TRAIN. Service transmission/check engine warning indicator for the 850RE, 8HP50, 8HP70, 8HP75, 8HP75-PHEV transmissions that have fault codes P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
S1923000010 REV.A2026-03-05. Service bulletin. STRUCTURE:BODY. Floor Console Center Storage Bin Door Inoperable And Or Stuck Closed.
S1408000384 REV.I2026-02-19. Service bulletin. ELECTRICAL SYSTEM. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS Related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
S26230000062026-02-19. Service bulletin. ELECTRICAL SYSTEM. Washer Fluid Warning Lamp Illuminated When Reservoir Is Full
18-020-262026-02-19. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates **Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0300-00 - Multiple Cylinder Misfire - in Active or Stored status set during cold start catalyst heating. ● P0301-00 - Cylinder 1 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0302-00 - Cylinder 2 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0303-00 - Cylinder 3 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0304-00 - Cylinder 4 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0305-00 - Cylinder 5 Misfire - in Active or Stored status set during cold start catalyst heating. ● P0306-00 - Cylinder 6 Misfire - in Active or Stored status set during cold start catalyst heating.** ● P0335 - Crankshaft Position Sensor Circuit. ● P0339 - Crankshaft Position Sensor Intermittent. **Customers may comment on one or more of the following: ● Vehicle has a rough idle. ● Engine has a miss. ● Noisy valvetrain.** Other software enhancement included with this update: ● Idle stability improvements during Electronic Stability Control (ESC) events. , Claims Data and Special Tools sections, updated LOP number, Repair Procedure and new Repair Procedure notes. **REPAIR SUMMARY:
1096212026-01-28. Warranty extension. ENGINE. D-25-17 Rev. A ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and/or Rocker Arm Replacements
1097672026-01-28. Warranty extension. ENGINE. ID-25-14 Rev. A ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and/or Rocker Arm Replacements
1097272026-01-28. Service bulletin. ENGINE. Water Pump & Chain Case Cover
1097242026-01-28. Service bulletin. ENGINE. Water Pump & Chain Case Cover
1091522026-01-21. Service bulletin. UNKNOWN OR OTHER. CORE – HEATER
1091532026-01-21. Service bulletin. UNKNOWN OR OTHER. CORE – HEATER
91007352025-12-17. Service bulletin. ELECTRICAL SYSTEM. Verify "Z" part number availability. Order a "Z" part number for all Exchange Orders: Warranty, Mopar, Customer pay and Service contract. Order"68" part number for New unsold units only
S25050000032025-12-17. Service bulletin. SERVICE BRAKES. Diagnostic Trouble Code (DTC) C0050-00-Brake System Hydraulic Leak Set After Recent Repair.
S25230000912025-12-17. Service bulletin. SERVICE BRAKES. Antilock Brake (ABS) Light On. Intermittent Or Implausible Wheel Speed Sensor Signal Diagnostic Trouble Codes (DTCs)
1088862025-12-11. Service bulletin. ELECTRICAL SYSTEM. SENSOR - ACCELERATION
S25020000012025-12-11. Service bulletin. SUSPENSION. Lower Ball Joint / Lower Control Arm Servicing Updates.
S1805000006 REV.B2025-11-13. Service bulletin. SERVICE BRAKES. ESC Light Illuminated. DTC C1252-92 VACUUM PUMP CONTROL CIRCUIT And Or P258B ELECTRONIC VACUUM PUMP PERFORMANCE
1084092025-11-13. Service bulletin. UNKNOWN OR OTHER. CORE - HEATER
1084102025-11-13. Service bulletin. UNKNOWN OR OTHER. CORE - HEATER
91007022025-11-05. Service bulletin. ENGINE. Dealer technicians have reported failures involving camshaft cap bolts breaking within the cylinder head assembly. This can lead to damage to camshaft towers, camshafts, and other cylinder head components. In many cases, the entire long block has been replaced unnecessarily. Do NOT replace the entire long block unless absolutely necessary. Perform a thorough inspection and replace only the cylinder head assembly if the damage is localized.
S25090000092025-11-05. Service bulletin. ENGINE. Engine Oil Leak
S25240000122025-10-15. Service bulletin. UNKNOWN OR OTHER. High Voltage Air Conditioning Refrigerant Dye
S25220000032025-10-15. Service bulletin. WHEELS. Tire Pressure Monitor (TPM) Warning Lamp On Or Flashing. Sensor(s) Not Reading And Or Showing Dashes.
1075632025-10-02. Warranty extension. ENGINE. D-25-17 ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and Rocker Arm Replacements

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