Peterbilt 348 headlight bulbs use 9007 size for both high beam and low beam applications. The replacement chart covers 2010 to 2017 vehicle 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 Peterbilt 348 uses the 9007 bulb type for both high beam and low beam headlights across the 2010-2017 model years.
The 9007 is a dual-filament bulb, meaning a single bulb contains separate filaments for high and low beam functions rather than requiring two distinct bulbs per housing.
Because the 9007 serves both beam functions in the 348, the high beam and low beam positions draw from the same bulb part number, which simplifies parts sourcing.
The 9007 bulb operates on a standard halogen design with a rated output of approximately 65 watts on high beam and 55 watts on low beam.
The 9007 uses an HB5 base configuration, which is a specific keyed connector that is not interchangeable with similarly sized single-filament types such as the 9005 or 9006 without modification.
The 9005 and 9006 bulbs share a physical size close to the 9007 but differ in base orientation and filament count, making them incompatible direct replacements for the 348 headlight sockets.