Toyota Tundra Parking Light Bulb Size

Additional Notes

• The 4157NA is the most frequently specified front parking light bulb across the Toyota Tundra model range, appearing in vehicles from 2000 through 2024. It is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and 7W low filament, produced to the ANSI standard for the US and Canadian markets. Its natural amber glass provides the color output without relying on a painted or coated envelope.
• The 3157NA and 4157NA share the same T25 wedge form factor, voltage rating, and wattage values, but they are not the same part. The 3157NA was specified for the Toyota Tundra from 2000-2004, after which the 4157NA took over in later model years. Despite their similar electrical ratings, these two bulb types have different base configurations and are not interchangeable.
• The 5702AK is a Sylvania-specific part number rather than a standalone ANSI designation. It refers to an amber-coated variant of the 3157 bulb, sharing the T25 wedge body and the 12V, 27W/7W rating. The amber effect is achieved through a coating applied to the glass envelope rather than through the glass composition itself, which distinguishes it from the natural amber glass used in the 3157NA and 4157NA.
• The 7444NA is a T20 wedge bulb rated at 12V, 21W/5W, making it physically smaller and lower in wattage than the T25-based 4157NA. Both carry natural amber glass and dual-filament construction, but their differing body sizes and wattage ratings mean they are not interchangeable with each other or with the T25 family.
• The Toyota Tundra (2019) carries two distinct front parking light bulb specifications depending on the production date and headlamp configuration. Units built from August 2017 onward use the 7444NA, while those equipped with Halogen Capsule Headlamps use the 4157NA. Selecting the wrong bulb for a 2019 model requires knowing both the build date and the headlamp type fitted to that specific vehicle.
• The 2022 and 2020 model years similarly split between bulb types based on headlamp configuration. The 4157NA applies specifically to Tundra vehicles equipped with Halogen Capsule Headlamps in those years, indicating that headlamp system type is a determining factor in front parking light bulb fitment across multiple model years.
• The 9005 is the only single-filament bulb in these specifications and the only one using a P20d base rather than a wedge-style base. Rated at 12V and 65W, it is substantially higher in wattage than any other bulb listed here. It appears solely for the 2018 Toyota Tundra in one of the front parking light entries, and its base type makes it incompatible with any of the wedge-based bulbs in the same specification set.
• The 168 is a miniature T10 wedge bulb rated at 12V and 4.9W, single-filament, and significantly lower in output than the dual-filament bulbs used across most of the Tundra's model history. It was specified for the 2005-2006 model years and is not electrically or physically compatible with the T25 or T20 bulbs used in surrounding years.