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: Seats are shown. Show all
| 08-182-25 | 2025-06-10. Service bulletin. ELECTRICAL SYSTEM; SEATS. "Power Seat Not Adjusting Customers may experience one or more of the following: ● Driver and/or passenger seat moves backwards but not forward. ● Driver and/or passenger seat inoperative. This bulletin involves replacing the front power seat adjusters." |
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| S2108000052 | 2022-09-26. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER. Heated Seat LED Indicator Turns On And Back Off. One Or More Heated Seat DTC?s |
| 08-171-21 | 2021-12-13. Service bulletin. STEERING; WHEELS; ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:SOFTWARE; UNKNOWN OR OTHER; SEATS; ELECTRICAL SYSTEM. Flash: Comfort Seat and Wheel Module (CSWM) Enhancements This bulletin involves updating the CSWM with the latest available software. The customer may describe the following:The heated steering wheel gets too hot for customer comfort. |
| S2108000052 | 2021-03-15. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER; ELECTRICAL SYSTEM. Heated Seat LED Indicator Turns On And Back Off. One Or More Heated Seat DTC?s |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.