The Dodge Ram 2500 Van brake light requires bulb size 2458 or 3157 depending on the specific application. Data for the provided components covers the range from 1999 through 2003.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge Ram 2500 Van uses the 3157 bulb for the brake lights across the 1999-2003 model years. This bulb is a dual-filament T25 wedge type rated at 12V with a 27W/7W output, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary function such as running lights.
The 3157 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across manufacturers.
The center high mount stop light (CHMSL) on the Ram 2500 Van does not use a single bulb size across the 1999-2003 span. Three distinct bulb sizes appear across those years: the 921, 922, and 912.
The 921 is specified for the CHMSL in the 1999-2000 model years. It is a T15 wedge bulb rated at 12V and 16W.
The 922 is specified for the 2001 model year CHMSL. It is also a T15 wedge bulb rated at 12V and 16W, sharing its wattage and base type with the 921.
Although the 921 and 922 share the same T15 wedge base and 12V/16W rating, they are distinct ANSI part numbers and are not confirmed as interchangeable within these specifications.
The 912 is specified for the CHMSL in the 2002-2003 model years. It is a T15 wedge bulb rated at 12V and 12W, making it a lower-wattage variant compared to the 921 and 922.
The 912 is described as a variant of the 921. Despite sharing the T15 wedge base, the 912 operates at 12W while the 921 operates at 16W, a difference that affects light output and electrical load.
All four bulb types listed in these specifications, the 3157, 912, 922, and 921, are ANSI-standardized for both the United States and Canadian markets.
The CHMSL bulb size changed three times across the 1999-2003 production run of the Ram 2500 Van, indicating that direct substitution between model years for that position requires verification against the specific year being serviced.