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Service bulletins for the 2018 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.

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

By type

By component

By trouble code

Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
90032932022-07-25. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C Pressure Transducer A/C inoperative and diagnosis leads to pressure transducer. Call Steve Rice at cell (248) 867-0061 before replacing the pressure transducer. If no response in 15 minutes, please proceed with repair.
90038142022-07-25. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Power Distribution Center For 2018 D2/DD/DF/DJ/DP, prior to replacing the Power Distribution Center (PDC), you MUST contact the STAR Center (800) 850-7827 for diagnostic assistance and pre- authorization. Failure to do so WILL result in your warranty claim being rejected.
S228A0000042022-06-27. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Panasonic VP4R Wi-Fi New Enrollment Pause
S2108000127 Rev.2021-06-28. Service bulletin. EQUIPMENT. Radio Reboot Continually
S21080001302021-06-28. Service bulletin. EQUIPMENT. Bubbles Or Delamination On The Radio Display
S21080001272021-06-28. Service bulletin. EQUIPMENT. Radio Reboot Continually
S21080000932021-05-24. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION; EQUIPMENT. Apple CarPlay Does Not Work Or Not Connecting
S21080000802021-04-26. Service bulletin. EQUIPMENT. Radio Replacement Reset Routine, Radio Has Missing Icons Or Are Grayed Out
S21080000452021-03-15. Service bulletin. EQUIPMENT:ELECTRICAL. Favorite Song On-Air Alert List Empty
S1625000007 Rev.2021-03-15. Service bulletin. EXTERIOR LIGHTING; EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Code (DTC) P207F ? Reductant Quality Performance Set.
S1908000028 Rev.2020-12-28. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. (Rev. A) Power Inverter Load Ratings
08-094-202020-11-30. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); EQUIPMENT. Flash: Drivetrain Control Module (DTCM) Update This bulletin involves reprogramming the DTCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set::If the customer has any concerns with the transfer case or if the tech performs any repairs on the transfer case, the software must be updated.C140E - Transfer Case Motor Blocked. If DTC C140E is present, follow normal diagnostic procedures before updating the DTCM.In addition the customer may describe the following:The ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster (IPC). Transfer case shift fork tabs broken during range shift. Noisy (clunking/ratcheting) transfer case range shifts. Failure to complete transfer case range shifts. The following software enhancement is available:This update will help reduce premature transfer case failure.
S20080001412020-10-26. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Navigation Shows Incorrect Location
S20080001302020-09-28. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Radio UConnect GPS Based Trip Computer Missing
90036372020-09-28. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; EQUIPMENT. USB PORT, Media Hub For Android Auto and Apple Carplay issues, do not replace this part. Android Auto and Apple Carplay applications may not operate with the vehicle if an aftermarket cable is being used. Verify the functionality of these applications using an OEM Apple Lightning cable or an OEM provided USB cable for Android phones before performing any additional troubleshooting. For questions regarding Android Auto or Apply Carplay functionality, please contact FCA Redacted Content. If no response in 15 minutes, proceed with repair.
S20080000102020-08-24. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. Apple Carplay Inoperative Or Not Working, Phone Not Pairing, Carplay Lockup, Freeze or Audio Concerns
S20090000032020-07-27. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. Turbocharger vs Turbocharger Actuator Replacement
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
S20090000022020-06-22. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL. Oil Leak From The Front Timing Gear Housing Gasket. (Note: ETL, ETK, ETM, ETN Diesel Engines)
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
S19080001012020-06-22. Service bulletin. EQUIPMENT:ELECTRICAL. Remote Phone App Does Not Communicate With Vehicle Radio
23-015-202020-05-26. Service bulletin. STRUCTURE; EQUIPMENT. Disinfectant Solution Recommended for COVID-19
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.
S20080000602020-05-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. Radio Issues With iPhone 11
S20080000592020-05-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. Error Code 20 Message On the Radio Screen

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