The Ford Excursion high beam and low beam headlight bulbs utilize 9008 and 9007 size specifications. The replacement chart covers vehicle production spanning 2000 to 2005 with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Excursion uses the 9007 bulb for both high beam and low beam headlights across the 2000-2004 model years, making it the dominant bulb type in these specifications.
The 9007 is a dual-filament halogen bulb rated at 12V with a 65W/55W output, where the higher wattage serves the high beam filament and the lower wattage serves the low beam filament, both functions housed within a single bulb.
The 9007 operates on a PX29t base, which is a specific bayonet-style connector that determines physical fitment into the headlight housing.
The 2005 Ford Excursion uses the 9008 bulb for both high beam and low beam positions, which differs from all prior model years in these specifications.
The 9008 shares the same 12V, 65W/55W dual-filament halogen construction as the 9007 but uses a P26t base rather than a PX29t base, meaning the two bulb types are not physically interchangeable despite their identical electrical ratings.
Both the 9007 and 9008 carry ANSI standard designation applicable to the US and Canada, indicating they conform to a standardized performance and safety classification within those markets.
Because the 9007 and 9008 use different base types, a 9007 bulb from a 2000-2004 Excursion cannot be used as a direct replacement in the 2005 model, and vice versa, despite the matching voltage and wattage ratings.