The Dodge Ram 2500 Van side marker requires a unique 168 bulb size for proper illumination. Data for the specific lighting component covers the period from 2001 through 2001.
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 front side marker position uses two bulb types across the 1999-2003 model years: the 3457 and the 3157.
The 3457 is an ANSI-standard dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W high filament and 7W low filament.
The 3157 shares the same ANSI-standard T25 form factor, voltage rating, and wattage values as the 3457, making the two bulbs closely related in specification.
Despite their near-identical electrical ratings, the 3457 and 3157 are distinct part numbers, and substituting one for the other without confirming socket compatibility may result in an improper fit.
The 2002 model year front side marker is the sole year specified with the 3157, while the 1999-2001 and 2003 model years are specified with the 3457.
The rear side marker position on the Dodge Ram 2500 Van uses the 168 bulb for the 1999-2001 model years.
The 168 is an ANSI-standard single-filament miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W.
The T10 form factor of the 168 is physically smaller than the T25 form factor used by the 3457 and 3157, meaning these bulb families are not interchangeable across positions.
The single-filament design of the 168 contrasts with the dual-filament construction of the 3457 and 3157, reflecting the different functional requirements of the rear side marker versus the front side marker.
All three bulb types listed in these specifications conform to ANSI standards recognized in both the United States and Canada.