The Ram 1500 parking light utilizes 7444NA, 3157NA, 3157, and 2458 bulb sizes according to the provided data. Available information covers a time range from 2011 through 2024.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ram 1500 front parking light position uses three bulb types across its model years: the 3157NA, the 7444NA, and the 3157. All three conform to ANSI standards applicable in both the United States and Canada.
The 3157NA and the 3157 share the same T25 wedge base, voltage rating of 12V, and dual-filament wattage of 27W for the high-draw filament and 7W for the low-draw filament. The sole distinction between them is that the 3157NA features natural amber glass, while the 3157 uses a clear envelope.
The 7444NA is a T20 wedge bulb, making its base physically smaller than the T25 used by the 3157NA and 3157. It operates at 12V with a 21W/5W dual-filament configuration, drawing less power than the 3157-series bulbs at both filaments.
Because the 3157NA and 7444NA share the NA amber designation but differ in base size and wattage, they are not interchangeable with each other despite both being natural amber dual-filament types.
The Ram 1500 (2013-2018) uses the 3157NA specifically on vehicles without projector-type headlamps, indicating that headlamp configuration is a determining factor in front parking light bulb fitment for those model years.
For the 2019-2020 Ram 1500, the 7444NA applies to vehicles equipped with halogen capsule headlamps, again tying parking light bulb selection directly to the headlamp system installed on the vehicle.
The 2021 Ram 1500 lists both the 3157NA and the 7444NA for the front parking light position, reflecting that two different bulb sizes were in use within the same model year depending on vehicle configuration.
The 2011-2012 Ram 1500 is the only range in the specifications where the clear 3157 bulb appears, fitted to vehicles with a two-headlamp setup, while the four-headlamp configuration in those same years uses the amber 3157NA instead.