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Service bulletins for the 2021 Ram 4500

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.

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

By type

By component

By trouble code

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
S25050000032025-12-17. Service bulletin. SERVICE BRAKES. Diagnostic Trouble Code (DTC) C0050-00-Brake System Hydraulic Leak Set After Recent Repair.
1036222025-03-04. Service bulletin. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
1036212025-03-04. Service bulletin. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
08-222-242024-10-14. Service bulletin. SERVICE BRAKES. "Flash: Anti-Lock Brake System (ABS) Module Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):** ● **C2200-47 - Anti-Lock Brake Module Internal - Watchdog / Safety Auc Failure.** ● C006A-49 - Multi-Axis Acceleration Sensor - Internal Electronic Failure. Customers may also comment on one or more of the following: ● **Anti-lock Brake System (ABS) indicator light illuminated in the Instrument Panel Cluster (IPC). ● Electronic Stability Control (ESC) indicator light illuminated in the IPC. ● The Red Brake Warning indicator light illuminated in the IPC.** This bulletin involves reprogramming the ABS with the latest software available."
993992024-07-31. Other. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
994002024-07-31. Other. SERVICE BRAKES. MODULE - ANTI-LOCK BRAKE SYSTEM
S1623000028 Rev.2023-02-13. Service bulletin. VEHICLE SPEED CONTROL; BACK OVER PREVENTION; POWER TRAIN; VISIBILITY; PARKING BRAKE. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S2118000001RevB2023-01-17. Service bulletin. EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC; BACK OVER PREVENTION. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P0471 ? Exhaust Pressure Sensor 1 Performance, Set.
S21230000552023-01-17. Service bulletin. ENGINE; SERVICE BRAKES. HD Truck Brake Pedal Feel On Gas Engine Equipped
S21080001702023-01-17. Service bulletin. PARKING BRAKE. Head unit button stuck DTC code B14DA-2A
90038052023-01-17. Service bulletin. SERVICE BRAKES. HUB AND BEARING, Brake, Front For issues with front wheel Hub/Bearing growling or humming noise, appearing to leak grease, or with excessive play, please contact FCA Redacted Content before replacing. If no response in 15 minutes, proceed with repair. For further diagnosis reference Service Library for Tech Tube video on Wheel Bearing Diagnosis.
22001222022-12-19. Service bulletin. BACK OVER PREVENTION; LANE DEPARTURE; SERVICE BRAKES, HYDRAULIC; EXTERIOR LIGHTING. TPMS Does Not Read Tire Pressure For The Rear Tires This bulletin involves adding a sales code and performing a restore vehicle configuration. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find thefollowing Diagnostic Trouble Code (DTC) has been set: C15CE-31 - Tire Pressure Sensor 7-No Signal. Customers may also comment on the following: Instrument Panel Cluster (IPC) warning is illuminated for the tire pressure sensors.
S2208000153RevA2022-12-12. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. Tire Pressure Lamp Flashing, No Tire Pressures Displayed, ?Tire Pressure Module (TPM) System Unavailable? Message Displayed on Cluster
S22080001532022-11-07. Service bulletin. ELECTRICAL SYSTEM; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS; SERVICE BRAKES, HYDRAULIC. Tire Pressure Lamp Flashing, No Tire Pressures Displayed, ?Tire Pressure Module (TPM) System Unavailable? Message Displayed on Cluster
S21080001702022-09-26. Service bulletin. PARKING BRAKE. Head unit button stuck DTC code B14DA-2A
18-072-212022-08-22. Service bulletin. EXTERIOR LIGHTING; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; FUEL SYSTEM, DIESEL; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; BACK OVER PREVENTION; SERVICE BRAKES, HYDRAULIC. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module (ECM) / Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0607-00 - ECU Internal Performance. P0299-00 - Turbocharger Underboost. P1451-00 - Diesel Particulate Filter System Performance. The following improvements are also included in this update: Oil pressure switch modifications. Urea (DEF fliud) level sensor calibration update, to help prevent bumps in DEF level gauge.
S21090000012022-07-18. Service bulletin. SERVICE BRAKES. Customer may complain of a MIL lamp on. Upon further investigation there could be a fault code in the PCM for P1524 ? Oil Pressure Out of Range ? Camshaft Advance/Retard Disabled.

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