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Service bulletins for the 2021 Ram 2500

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Air bags are shown. Show all

Bulletins, newest first
18017232024-01-02. Service bulletin. POWER TRAIN; BACK OVER PREVENTION; ELECTRICAL SYSTEM; AIR BAGS. Flash: Powertrain Control Module (PCM) Updates Customer or technician may experience the following: ? High frequency exhaust noise at idle after cold start. ? Power Take Off (PTO) disable to high engine oil temperature. ? Multiple Displacement System (MDS) transition causing a transmission clunk noise under light throttle when coasting in fourth gear. This bulletin involves reprogramming the PCM with the latest available software.
18017232023-04-17. Service bulletin. BACK OVER PREVENTION; AIR BAGS; POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates Customer or technician may experience the following: ? High frequency exhaust noise at idle after cold start. ? Power Take Off (PTO) disable to high engine oil temperature. ? Multiple Displacement System (MDS) transition causing a transmission clunk noise under light throttle when coasting in fourth gear. This bulletin involves reprogramming the PCM with the latest available software.
S1823000056RevE2022-09-26. Service bulletin. AIR BAGS; SEATS; VEHICLE SPEED CONTROL; EXTERIOR LIGHTING. Tailgate Ajar Indicator Light Is On And Or High Effort Required To Close And Latch The Tailgate
S22080001172022-09-26. Service bulletin. AIR BAGS; LANE DEPARTURE; FUEL SYSTEM, GASOLINE; FUEL SYSTEM, DIESEL. Check Engine Light and/or Service Air Suspension, Service Diesel Exhaust System or Multiple Cluster Warning Lamps Illuminated With Electronic Vehicle Information Center (EVIC) Messages
S21240000032021-05-24. Service bulletin. AIR BAGS. A/C Performance Not As Hot/Cold On Driver Side - DTC's B11CB-92, B11CB-11
08-029-21 REV. A2021-04-26. Service bulletin. VEHICLE SPEED CONTROL; AIR BAGS; VISIBILITY; ELECTRICAL SYSTEM. Door Control Module Window Inoperative This bulletin involves replacing one or both of the door modules. Technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: B18BA-12 - Window Control - Circuit Short to Battery B18BA-13 - Window Control - Circuit Open In addition the customer may notice one or more of the following: Driver and/or passenger windows stop working. If the window switch is held in the up position for at least two seconds,the obstruction auto-down function may not work. Windows may go up slower than expected.

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