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Service bulletins for the 2018 Ram 3500

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.

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

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
03-001-202020-06-22. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; SUSPENSION. Rear Axle Vibration, Shudder Or Chatter This bulletin involves changing the rear axle lube to possibly address a chatter, shudder or vibration. The customer may describe the following: A chatter, shudder, or vibration from the rear axle during turns. This may happen more as the vehicle ages, especially if the vehicle is used extensively for towing or hauling heavy loads. The cause of the concern may be due to degradation of the rear axle fluid. It is very important to follow the routine maintenance schedules on these vehicles when it comes to changing the rear axlefluid if the vehicle is used primarily for towing or hauling heavy loads. If you experience a vehicle with the above condition, please perform the proper maintenance procedures for the rear axle and replace the fluid first before replacing any hardware components.This service bulletin is only applicable to vehicles that have no history of an axle fluid replacement. If the vehicle usage includes police, taxi, fleet, off-road or frequent trailer towing, regular axle fluid changes are required every2 years or 20,000 miles (whichever comes first) per the Maintenance Schedule in the vehicle Owner's Manual.
S20080000732020-06-22. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. VP4 Panasonic Radio USB Software Update Error Codes And Guidelines For Recovery
S19080000482020-06-22. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Chime Stuck On In The Audio System
S18080002352020-06-22. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Sound Distortion After FOTA Update Audio Sounds Muffled Has Too Much Bass or Flat Sounding
08-049-202020-05-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Charging System, Battery Diagnostic Tools and Warranty This information only bulletin discusses using the correct test equipment for testing batteries and charging systems, and also warranty reimbursement when battery replacements are necessary.
18-036-202020-05-26. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. This bulletin fixes all vehicles listed and also contains an optional software path for situations where the customer is specifically complaining of a drone noise, shudder, pulsation, or vibration under light throttle applications, while vehicle is operating in Multi Displacement System/Economics (MDS/ECO) mode (optionalsoftware available for D2&DJ vehicles).There will be two separate software options displayed on the wiTECH flash tab. The software file released for this condition contains the verbiage ?MDS NOISE?. The other file is the standard software that does not contain improvements for the drone/shudder concern. If for some reason the customer finds this shudder improvementobjectionable, the PCM software may be returned/reflashed to the standard version.Both software versions will address the remaining conditions noted in the bulletin.The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs):P3402 - Cylinder 1 Deactivation Control Performance. P3426 - Cylinder 4 Deactivation Control Performance. P3442 - Cylinder 6 Deactivation Control Performance. P3450 - Cylinder 7 Deactivation Control Performance. P0128 - Thermostat Rationality. Customers may also describe the following condition:Heater not warming cabin sufficiently and engine slow to warm up. This condition could be caused by a malfunctioning thermostat which is not associated with an HVAC issue.
D-19-02 Rev. D2020-05-26. Service bulletin. ELECTRICAL SYSTEM. Fast Feedback Program ? 6.7L Cummins Engine - 2019 & 2020 HD Ram & 6.7L Cummins Diesel Engine Control Module (ECM) - 2018 Ram ? All Models (Rev. D)
S18080001522020-05-26. Service bulletin. ELECTRICAL SYSTEM. CEL (Check Engine Lamp) Illuminates, Recent PCM Replace Or Flash Update Performed, DTC P057B Brake Pedal Position Sensor Circuit Performance
S20050000042020-05-26. Service bulletin. ELECTRICAL SYSTEM. C0020-01-ABS PUMP MOTOR CONTROL - GENERAL ELECTRICAL FAILURE
S20210000022020-05-26. Service bulletin. ELECTRICAL SYSTEM. Valve Body Pressure Testing Plug Inspection
90042512020-05-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. RFE Valvebody Plug Installation OEM RFE valve bodies require seven (7) 06030035 plugs installed and torqued to 45 in-lb (5Nm). Notify independant repair facilities when they order valve body.
90042462020-05-26. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. MODULE, Anti-Lock Brake System If ordering ECU PN 68347098AB or later to repair a C0020-01 ABS PUMP MOTOR CONTROL - GENERAL ELECTRICAL FAILURE, The HCU Hydraulic Control Unit can be replaced alone for this DTC. For any other DTC's follow published diagnostics.
S15080004802020-04-27. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Speed Control Operates Intermittently
S20080000132020-04-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Key Programming, Security Pin Request, Pin Invalid
21-043-192019-12-16. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may notice a harsh 2-3 and 3-4 shift. The following software enhancements are available:2-3 and/or 3-4 shift improvements.
08-016-19 REV. F2019-12-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. UAS, UAQ, UCS and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to:22.6 - DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio. 22.5 - LA, LD and LX vehicle with UAS and UAQ. 21.9 - All other vehicles and radios. Customers may experience one or more of the following:Audio Distortion (DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio). Menu bar at the bottom of the radio display is frozen (LA, LD and LX with UAQ and UAS radios). Can not change the time on the clock (LA, LD and LX with UAS radios). Anti-theft code request message. Backup camera screen is blank. Lines appear across screen. Radio control screen is blank or locked. Radio resets intermittently. Unable to adjust volume. Radio will not switch modes between AM, FM, SAT or Media. In addition, the following enhancements are included in this update:Carplay® connectivity improvements. Improvement to Bluetooth phone pairing. Improved sound quality when using a Bluetooth phone.
08-016-19 REV. D2019-12-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. UAS, UAQ, UCS and UCQ Radio Enhancements This bulletin involves inspecting and if required, updating the radio software level to:22.6 - DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio. 22.5 - LA, LD and LX vehicle with UAS and UAQ. 21.9 - All other vehicles and radios. Customers may experience one or more of the following:Audio Distortion (DS, D2, DP, DD, DF and DJ vehicle with UAS, UCQ and UAQ radio). Menu bar at the bottom of the radio display is frozen (LA, LD and LX with UAQ and UAS radios). Can not change the time on the clock (LA, LD and LX with UAS radios). Anti-theft code request message. Backup camera screen is blank. Lines appear across screen. Radio control screen is blank or locked. Radio resets intermittently. Unable to adjust volume. Radio will not switch modes between AM, FM, SAT or Media. In addition, the following enhancements are included in this update:Carplay® connectivity improvements. Improvement to Bluetooth® phone pairing. Improved sound quality when using a Bluetooth phone.
546382019-07-15. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. ASH RECEIVER - INSTRUMENT PANEL
90040162019-07-15. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY:SOLENOID; POWER TRAIN. SOLENOID, Transmission For vehicles equipped with 68RFE transmission (sales code DG7) setting only a P0870 DTC, please refrain from replacing a solenoid, pressure sensor, transmission or valve body. Replacement will not resolve the fault due a calibration issue pending resolution. Please reset code, and in the event the DTC reoccurs, please contact STAR for further assistance.
56041380A2018-11-26. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Battery Please call Bob Horn at cell (248) 231-3315 prior to replacing any battery. Please identify battery with the last 8 VIN digits along with the 15 digit Medtronic code from the GR-8 tester. If no response in 15 minutes, continue with the repair. Battery needs to be held and not turned in for core charges.
08-028-162018-06-25. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM:SOFTWARE. RE2 RE6 RB5 RB6 Radio Software Enhancements This bulletin involves updating the radio software and navigation if equipped. A customer may experience one or more of the following conditions: · Radio display screen will lock up and reset intermittently. · Incorrect routing directions to fuel stations when using Travel Link. · Unable to turn on heated seats; icon is greyed out. · Navigation screen goes blank. · Navigation system freezes/locks up. · Vehicles with Mopar special edition radio will update radio?s splash screen. · Navigation icon shows the vehicle going backward when it?s moving forward.
18-023-162018-06-11. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Flash: 2.4L Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination or one or more of the following conditions. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory:
171612018-06-11. Service bulletin. ELECTRICAL SYSTEM:IGNITION; EQUIPMENT; ELECTRICAL SYSTEM:IGNITION:SWITCH. You have been identified as either having stock, or have stock in transit to your dealership. Please return suspect stock of part number 04685719AI. See attachments for identifying suspect stock. Please return suspect parts back to your facing depot using Return Code 02, before 11 July, 2016. Return any open orders in process too. Direct all questions via email to mopardmail@fcagroup.com.
306572018-06-11. Service bulletin. ELECTRICAL SYSTEM. R4801865AC Alternator Assy - 220 Amp You have been identified as either having stock, or have stock in transit to your dealership. Please return all stock of part number R4801865AC. Replacement is part number 04801865AE which is in stock and available. Please return suspect parts back to your facing depot using Return Code 02, before 04 April, 2017.
68184926A$2018-05-21. Service bulletin. ELECTRICAL SYSTEM. Integrated Center Stack If vehicle is found within 50 mile radius of the Detroit Metro area please hold vehicle and contact:~ Contact one of the following:~ Daniel Acciacca CELL (586) 709-1537~ Michael Savich CELL (248) 214-7270~ Ayed Hadaad CELL (248) 941-8707~ Issue: On a 2015 & 2016MY LA (Challenger), LD(Charger) and LX (300), the Integrated Center Stack (ICS) may experience a lock-up/Inop condition (complete loss of functionality) during any vehicle diagnostic session (reading fault codes, clearing fault codes, reflashing of any module, etc.). If this occurs, do not replace the ICS. The module functionality can be restored if it is reset by disconnecting power to it (by removing fuse, battery disconnect or module connector disconnect).~

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