Peterbilt 367 front turn signal bulbs utilize 4157NA, 1157, or 2057 bulb sizes, while rear turn signal applications require 1157 or 2057 bulb sizes. The replacement chart covers 2008 through 2017 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 1157 bulb is the most widely used type across the Peterbilt 367's turn signal specifications, appearing in both front and rear positions across the majority of model years covered.
The 1157 is a dual-filament bulb rated at 12V with a 21W high-filament and 5W low-filament draw, mounted via a BAY15d bayonet base, and built to ANSI standards applicable in both the United States and Canada.
The BAY15d bayonet base found on the 1157 features two offset pins, which physically prevents incorrect insertion and ensures consistent filament alignment within the socket.
The 2057 shares the same BAY15d bayonet base as the 1157 but operates at higher wattage ratings of 26.9W and 8W, making the two bulbs physically interchangeable in terms of base fitment while differing in electrical output.
The Peterbilt 367 used the 2057 bulb in both the front and rear turn signal positions for the 2008-2009 model years.
The 4157NA is a dual-filament T25 wedge bulb rated at 12V with a 27W high-filament and 7W low-filament draw, and its natural amber glass produces a color-filtered output without relying on a tinted lens.
The 4157NA wedge base differs structurally from the BAY15d bayonet base used by the 1157 and 2057, meaning the three bulb types are not interchangeable without a socket adapter or housing modification.
The Peterbilt 367 front turn signal position shifted to the 4157NA for the 2016-2017 model years, while the rear turn signal retained the 1157 throughout that same period.
The front and rear turn signal positions on the Peterbilt 367 share the same bulb specification for all model years from 2010-2015, with both positions calling for the 1157.
All three bulb types listed in the specifications, the 1157, 2057, and 4157NA, conform to ANSI standards and are rated for 12-volt electrical systems.