Ram 1500 Classic Parking Light Bulb Size

Additional Notes

• The 3157NA is the parking light bulb used across the Ram 1500 Classic for model years 2019-2023, making it the sole bulb type referenced in these specifications.
• The 3157NA follows the ANSI standard recognized in both the United States and Canada, classifying it as a regulated bulb type with defined electrical and physical parameters.
• It is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, each operating at a different wattage: 27W for the higher-intensity filament and 7W for the lower-intensity filament.
• The bulb operates on a 12V electrical system, consistent with standard automotive voltage found in passenger vehicles.
• The T25 designation refers to the wedge-style base form factor of the bulb, which determines physical fitment into the socket.
• The natural amber glass envelope of the 3157NA produces a yellow-tinted output without relying on a colored lens, distinguishing it from clear-glass variants such as the standard 3157.
• For the Ram 1500 Classic (2019), the 3157NA fitment is conditional, applying only to vehicles without projector-type headlamps. This represents a compatibility restriction tied to headlamp configuration rather than model year alone.
• The 3157 bulb family includes multiple variants, such as the 3157 (clear) and 3157A (amber), and substituting a different variant in place of the 3157NA may affect light output color or filament configuration.