Mercedes-Benz Sprinter front parking light bulb sizes include 12961 and 3457NA, with each bulb size corresponding to specific vehicle configurations. The replacement chart covers 2019 through 2025 model year data and specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz Sprinter front parking light uses two distinct bulb types across its model years, with the 12961 fitted to 2022-2025 models and the 3457NA fitted to 2019-2021 models equipped with halogen headlamps.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base and rated at 12V and 5W.
The T10 form factor of the 12961 is a small single-filament wedge type, commonly used in low-power indicator and position light applications.
The 3457NA follows the ANSI standard used in the United States and Canada, and it is a dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W main filament and a 7W secondary filament.
The natural amber glass of the 3457NA produces a colored output without requiring an amber lens, which distinguishes it from clear-glass equivalents in the same bulb family.
The 3457NA's dual-filament design means it carries two independent circuits within a single bulb, a configuration that allows one bulb to serve both a parking light function and a higher-intensity function such as a turn signal.
The 12961 and 3457NA are not interchangeable. They differ in base type, wattage, filament count, and physical form factor, making cross-substitution between the two generation groups incompatible.
The halogen headlamp condition noted for the 2019-2021 Sprinter indicates that the 3457NA fitment is specific to that headlamp configuration, meaning other headlamp variants in those years may use a different front parking light bulb.