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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

Only bulletins with component: Wheels are shown. Show all

Bulletins, newest first
S25220000032025-10-15. Service bulletin. WHEELS. Tire Pressure Monitor (TPM) Warning Lamp On Or Flashing. Sensor(s) Not Reading And Or Showing Dashes.
S24080001302025-01-03. Service bulletin. WHEELS; ELECTRICAL SYSTEM. Changing Tires to a Larger Size Triggers a Park Assist Module (PAM/PTS) to Set Diagnostic Trouble Code (DTC) B222A Vehicle Line Mismatch
S2422000001 REV.C2024-11-13. Service bulletin. WHEELS; ELECTRICAL SYSTEM. Tire Pressure Monitor (TPM) Service Information. TPM Lamp On.
S2208000153 REV.B2024-09-27. Service bulletin. ELECTRICAL SYSTEM; WHEELS. Tire Pressure Lamp Flashing, No Tire Pressures Displayed, “Tire Pressure Module (TPM) System Unavailable” Message Displayed on Cluster
90040732023-07-31. Service bulletin. BACK OVER PREVENTION; WHEELS. SENSOR, Wheel Speed When replacing a front wheel speed sensor, hold the convolute towards the sensor head and add a zip tie over the convolute to secure it with the sensor pigtail wire to prevent movement. This will protect the wire from the brake splash shield.
08-008-232023-02-13. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION; WHEELS; STEERING. UAS and UCS Radio Enhancements Customers may experience one or more of the following: **Wi-Fi hotspot connection failure. Speaker popping, crackle noise during Voice Recognition (VR) response and navigation guidance. Mobile Station Integrated Services Digital Network (MSISDN) missing from radio, no connected services working.** Wireless connectivity pairing and/or connection issues. Lost radio presets. Radio channels change by itself. SXMT icon inoperative. SXMT favorite song not displaying/playing. High pitch squeal, pop or hum noise from speakers. Anti-theft code request message. Lines appear across screen. Radio will not switch modes between AM, FM, SAT or Media. Performance control home screen shows ?Norm? mode for engine/transmission even when the vehicle is in ?Drag? mode (LA, LD, LX only). Can not change the time on the clock (LA, LD and LX only). USB hub inoperable (D-Trucks only). Backup camera gridlines missing (D-Trucks only). Device not supported message (D-Trucks only). Remote app inoperative (D-Trucks only). Unable to adjust volume (D-Trucks only). Heated steering wheel inoperable (D-Trucks only). In addition, the following enhancement are included in this update: CarplayT connectivity improvements. Improvement to wireless connectivity phone pairing. Improved sound quality when using a wireless connectivity phone. **This bulletin involves inspecting and if required, updating the radio software level to 40.1. Depending on the radio?s current software level the radio may need a one or two USB update.**
21020212023-01-17. Service bulletin. POWER TRAIN; WHEELS; STEERING; ELECTRICAL SYSTEM. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
21019212023-01-17. Service bulletin. STEERING; WHEELS; ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
21020212022-10-17. Service bulletin. WHEELS; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; STEERING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
21019212022-10-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN; WHEELS; ELECTRICAL SYSTEM; STEERING; ELECTRICAL SYSTEM:SOFTWARE. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
S2111000001RevA2022-09-26. Service bulletin. WHEELS; BACK OVER PREVENTION. Customer complains of a brief metallic ticking/rattling/ringing noise after a cold start-up. It can be heard while standing outside the vehicle, resonating from the front wheel well areas. If the noise is present, it is normally heard at idle and the frequency of the noise will follow engine speed.
02001212022-09-26. Service bulletin. WHEELS; STEERING; SUSPENSION. Steering Wheel Off-center Due to Incorrect Front Wheel Alignment Specifications This bulletin involves adjusting the front wheel alignment to correct a steering wheel off center condition. This is due to an inaccurate alignment settings from the plant. The customer may describe the steering wheel is off center.
S21110000012022-09-26. Service bulletin. BACK OVER PREVENTION; WHEELS. Customer complains of a brief metallic ticking/rattling/ringing noise after a cold start-up, that can be heard while standing outside the vehicle, resonating from the front wheel well areas. If the noise is present, it is normally heard at idle and the frequency of the noise will follow engine speed.
08-138-212022-08-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; WHEELS; STEERING; BACK OVER PREVENTION. UAV and UCV Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to: 39.6.The repair procedure must be followed step by step. If the radio is not updated with the correct software level at the correct time the radio can be damaged. If the radio was damaged by not following the repairprocedure the radio may need to be replaced. Customers may experience one or more of the following: Lost radio presets. SXM favorite song not displaying/playing. Radio display screen is black, intermittent. Radio freeze intermittent. Incorrect navigation address/location/directions. Bluetooth pair or connection issue. Radio channel changes by itself. SXM icon inoperative. Backup camera has black display screen. High pitch chime noise. Contact list not loading. ?Device Not Supported? message. Remote app inoperative. Travel-Link fuel price incorrect. Backup camera gridlines missing. Unable to adjust volume. In addition the following enhancements are included: Heavy Duty (HD) Truck USB HUB improvements. HD Truck heated steering wheel improvements.
S2108000003 Rev.2022-07-18. Service bulletin. WHEELS; LANE DEPARTURE; STEERING; TRAILER HITCHES; VISIBILITY. Cluster Displays Blind Spot Alert Off Incompatible Trailer Message, Left Steering Wheel Switches Do Not Allow Update Or Change
S21080000032022-07-18. Service bulletin. VISIBILITY; EQUIPMENT ADAPTIVE/MOBILITY; WHEELS; STEERING; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS. Cluster Displays Blind Spot Alert Off Incompatible Trailer Message, Left Steering Wheel Switches Do Not Allow Update Or Change
S21230000012022-07-18. Service bulletin. EQUIPMENT; WHEELS. Rear Wheel Spat Has A Gap Or Appears Loose
90040392022-07-18. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; WHEELS. Spat, Wheel Well Splash Shield If replacing this for a warrantable concern, prior to removal of the Spat, please contact FCA Redacted Content by phone at FCA Redacted Content. If no response within 15 minutes. Please take pictures and highlight the area concern; email pictures to FCA Redacted Content.
02-001-21 REV. A2021-12-13. Service bulletin. WHEELS; STEERING; SUSPENSION. Steering Wheel Off-center Due to Incorrect Front Wheel Alignment Specifications This bulletin involves adjusting the front wheel alignment to correct a steering wheel off center condition. This is due to an inaccurate alignment settings from the plant. The customer may describe the steering wheel is off center.
08-067-212021-05-24. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; WHEELS; STEERING; POWER TRAIN; EXTERIOR LIGHTING; AIR BAGS. Flash: Drivetrain Control Module (DTCM) Diagnostic and System Improvements This bulletin involves reprogramming the DTCM with the latest available software. The technician may find one or more of the following DTCs:U1440 - Implausible Transfer Case Ratio High Received. U0403-00 - Implausible Data Received From T-case. C1403-92 - Transfer Case Range Position Sensor-Performance Or Incorrect Operation(2019-2020 Vehicles Only). If only DTC C1403 is present, follow normal diagnostic procedures before updatingthe DTCM.In addition the customer may describe one or more of the following:Traction Control System light is illuminated. A driveline bump can be heard/felt occasionally when the driver is steady on the throttle at about 20-30% on a flat road while in 4WDAUTO(2019-2020 Vehicles Only). An excessive electric motor clicking sound from the middle of the vehicle/transfer case area, when on and off the throttle(2019-2020 Vehicles Only). An excessive electric motor clicking sound with steering wheel movement, most notable in parking lot or low speed maneuvering(2019-2020 Vehicles Only). A ?Service 4WD? message/fault without commanding a transfer case shift(2019-2020 Vehicles Only).If only the ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster (IPC) and no other symptom/conditionsare present, follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). The blinking of the ?4WD Low? and ?4WD High? indicator lights at the same time, on the transfer case selector switch.If both 4WD indicator lights on the transfer case selector switch are blinking and no other symptom/conditions are present,follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). During highway/freeway speeds, a bump in the driveline may be felt. This could also be described as a harsh transmission shift(2019-2020 Vehicles Only).
02-001-212021-04-26. Service bulletin. STEERING; WHEELS; SUSPENSION. Steering Wheel Off-center Due to Incorrect Front Wheel Alignment Specifications This bulletin involves adjusting the front wheel alignment to correct a steering wheel off center condition. This is due to an inaccurate alignment settings from the plant. The customer may describe the steering wheel is off center.
S21110000012021-03-15. Service bulletin. WHEELS. Customer complains of a brief metallic ticking/rattling/ringing noise after a cold start-up, that can be heard while standing outside the vehicle, resonating from the front wheel well areas. If the noise is present, it is normally heard at idle and the frequency of the noise will follow engine speed.
S21230000012021-02-16. Service bulletin. WHEELS. Rear Wheel Spat Has A Gap Or Appears Loose
90040392021-02-16. Service bulletin. WHEELS. Spat, Wheel Well Splash Shield If replacing this for a warrantable concern, prior to removal of the Spat, please contact FCA Redacted Content by phone at FCA Redacted Content. If no response within 15 minutes. Please take pictures and highlight the area concern; email pictures to FCA Redacted Content.

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