Service bulletins for the 2021 Ram Promaster 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.
8 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: 12-volt battery are shown. Show all
| S1408000384 | 2024-03-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 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 |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.