Dodge Sprinter front turn signal bulbs utilize 3457NA and 3357NA sizes, while rear turn signal bulbs require PY21W, 12496, or 1156 bulb sizes. The replacement chart covers 2003 through 2009 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The front turn signal positions on the Dodge Sprinter alternate between two bulb types across model years, with the 3457NA fitted in 2004, 2007, and 2009, while the 3357NA is fitted in 2003, 2005, 2006, and 2008.
The 3457NA and 3357NA are both T25 wedge bulbs operating at 12V under the ANSI standard used in the US and Canada, and both feature natural amber glass to produce the required amber signal color without a colored lens.
The key technical difference between the 3457NA and 3357NA is filament count. The 3457NA is a dual-filament bulb rated at 27W and 7W, while the 3357NA is a single-filament bulb rated at 27W only. These two types are not interchangeable despite sharing the same T25 form factor.
The rear turn signal position on the Dodge Sprinter uses four distinct bulb types across the 2003-2009 model range, reflecting a higher degree of variation than the front position.
The 1156 bulb serves the rear turn signal on the Sprinter for model years 2003-2006. It is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 21W.
The PY21W bulb, fitted to the 2009 rear turn signal, follows the ECE standard used in Europe and worldwide rather than the ANSI standard. It uses a BAU15s bayonet base, which has an offset pin orientation that physically prevents installation of a BA15s-based bulb such as the 1156 in its socket.
The BAU15s base of the PY21W and the BA15s base of the 1156 are externally similar but dimensionally distinct at the pin positions, making cross-substitution between these two bulb types mechanically incompatible.
The 12496 is a Philips/Osram proprietary part number rather than an ANSI or ECE designation, and it is specified for the rear turn signal on the 2007-2008 Sprinter. Its 12V rating is confirmed, though wattage is not specified under this part number in the provided data.
The PY21W and 1156 share the same 12V, 21W electrical rating but differ in base type and regulatory standard, meaning electrical equivalence does not imply physical interchangeability between these two bulbs.
Across all front turn signal positions in the specifications, only ANSI-standard bulbs are listed, while the rear turn signal position includes both ANSI-standard and ECE-standard types depending on the model year.