2021 Ram 3500 Technical Service Bulletins

584 technical service bulletins (TSBs) are on record for the 2021 Ram 3500. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11037344Sep 8, 2026Electrical system, Body and structure. Passive Entry O/S Dr Handle Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040.
• 11036754Aug 26, 2026Engine. Radiator - engine cooling
• 11036753Aug 26, 2026Engine. Radiator - engine cooling
• 11035981Jul 29, 2026Engine, Electrical system. Sensor - turbocharger speed
• 11035980Jul 29, 2026Electrical system, Engine. Sensor - turbocharger speed
• 11035074Jul 6, 2026Other or unknown. CORE – HEATER
• 11034910Jun 29, 2026Electrical system, Body and structure. Switch – headlamp
• 11034909Jun 29, 2026Electrical system, Body and structure. Switch – headlamp
• 11034385Jun 26, 2026Body and structure. Backup Camera Poor Image Quality Inspection
• 11034380Jun 25, 2026Transmission and drivetrain. If customer concern diagnosis leads to suspect u-joint issue with the prop shaft, u-joint service kit should be utilized to fix concern. Prop shaft replacement would not be required.
• 11034376Jun 25, 2026Other or unknown. Outlet - air conditioning & heater
• 11034375Jun 25, 2026Other or unknown. Outlet - air conditioning & heater
• 11034373Jun 17, 2026Engine. BEARING - CRANKSHAFT THRUST and KIT
• 11034338Jun 17, 2026Transmission and drivetrain. HD Front and Rear Prop Shafts Increase U-Joint Usage If customer concern diagnosis leads to suspect u-joint issue or failure with the prop shaft, u-joint service kit should be utilized to fix concern. Prop shaft replacement would not be required.
• 11034337Jun 17, 2026Engine. BEARING - CRANKSHAFT THRUST and KIT
• 11033975Jun 12, 2026Body and structure, Electrical system. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11033957Jun 8, 2026Electrical system. Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040.
• 11033897Jun 5, 2026Body and structure. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11033896Jun 5, 2026Body and structure, Electrical system. Passive Entry Exterior Door Handle Inoperative When Touched To Lock And Or Unlock.
• 11033889Jun 4, 2026Body and structure. For Dealer awareness, HD truck, eliminate 1 of 2 M8 Joints for Sidestep bracket to Body Attachment, Bolt and rivet (06102165AA, 06511062AA) per TCR # 402632, CN 80403-T18
• 11033308May 29, 2026Electrical system, Body and structure. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11032990May 21, 2026Engine. Radiator - engine cooling
• 11033001May 19, 2026Engine. On Cummins diesel applications that are for 2019 and newer the bpro part 1BP00507AB can on occasions create a check engine light. In these situations, it is recommended to use the appropriate Mopar air filter originally installed on the vehicle. The "AC" level of the part is in development to resolve this issue. 1BP00507AB should still be usable for 2018 and older Model year Cummins engines.
• 11032842May 13, 2026Electrical system. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle.
• 11032827May 8, 2026Transmission and drivetrain. Replace K1 Clutch / Input Shaft Assembly Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P0731-00 - Gear 1 Shift Incorrect Ratio (This DTC will set during a key cycle and shifting into Drive). Customers must also comment on the following: ● The transmission will not shift into or out of 1st - 4th gears.
• 11032650May 8, 2026Transmission and drivetrain. Replace K1 Clutch / Input Shaft Assembly Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P0731-00 - Gear 1 Shift Incorrect Ratio (This DTC will set during a key cycle and shifting into Drive). Customers must also comment on the following: ● The transmission will not shift into or out of 1st - 4th gears.
• 11032824May 7, 2026Electrical system. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle
• 11032647May 7, 2026Electrical system. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle
• 11032344Apr 30, 2026Body and structure. Squeak Or Squawk Noise Coming From Either Side Door Of The Vehicle, It Could Be Just One Door Or More. The Noise Can Be Present In Either The Upper Or The Lower Hinge.
• 11031471Apr 18, 2026Engine. Light Random Tick Noise From The Engine.
• 11031466Apr 17, 2026Engine. Diagnostic Trouble Code (DTC) P2459-00 Particulate Filter Regeneration Too Frequent Setting in the Powertrain Control Module (PCM) or Under Fueling or Over Fueling Condition After Fuel Injector(s) Replacement
• 11031241Apr 1, 2026Body and structure. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
• 11030229Mar 21, 2026Engine. Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored status) ● P0071-00 - Ambient Air Temperature Sensor Performance. (In Active or Stored…
• 11030269Mar 18, 2026Other or unknown. Backup Camera Poor Image Quality Inspection
• 11030138Mar 9, 2026Transmission and drivetrain. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75-PHEV, 8HP75-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
• 11030042Mar 5, 2026Electrical system. Active Diagnostic Trouble Code (DTC) B1A10-00, B1A11-00, B1A12- 00, B1A13-00-, B1A14-00, B1A15-00, B1A16-00, and B1A17-00 in The Radio Frequency Hub (RFH)
• 11030035Mar 4, 2026Electrical 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
• 11030026Mar 3, 2026Electrical system. SPEAKER - NONE
• 11030025Mar 3, 2026Electrical system. SPEAKER - NONE
• 11030024Mar 3, 2026Electrical system. SPEAKER - NONE
• 11030023Mar 3, 2026Electrical system. SPEAKER - NONE
• 11029754Feb 24, 2026Engine. Cummins 6.7L Air Filter Replacement DTC P0299 Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● P0299-00 - Turbocharger Underboost. Customers may also comment on the following: ● Low power/acceleration or lag condition. This bulletin involves performing an Air Handling Performance Test (APT) and possibly…
• 11029702Feb 18, 2026Body and structure. Floor Console Center Storage Bin Door Inoperable And Or Stuck Closed.
• 11028904Feb 14, 2026Electrical 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
• 11028894Feb 13, 2026Electrical system. Washer Fluid Warning Lamp Illuminated When Reservoir Is Full
• 11027838Jan 23, 2026Seat belts. Seatbelt Slow Retraction.
• 11026651Dec 10, 2025Electrical 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
• 11026634Dec 10, 2025Brakes. Diagnostic Trouble Code (DTC) C0050-00-Brake System Hydraulic Leak Set After Recent Repair.
• 11025513Nov 7, 2025Electrical system. Front Axle Disconnect (FAD) Electrical Connector Design Change On Replacement Axle Assemblies.
• 11025507Nov 6, 2025Other or unknown. CORE - HEATER

← All problems reported for the 2021 Ram 3500