Subaru Tribeca front and rear side marker bulbs utilize 168 and 1157 bulb sizes respectively. The replacement chart covers 2008 to 2014 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 Subaru Tribeca uses two distinct bulb types across its front and rear side marker positions for the 2008-2014 model years.
The front side marker on the Subaru Tribeca takes a 168 bulb across all 2008-2014 model years, with no variation in specification across that span.
The 168 bulb is a T10 miniature wedge type rated at 12V and 4.9W, conforming to ANSI standards recognized in both the United States and Canada.
The T10 wedge base design means the 168 bulb is inserted directly into a socket without a separate locking mechanism, relying on the wedge-shaped base to hold it in place.
The rear side marker position uses a 1157 bulb across all 2008-2014 model years, a specification that differs entirely from the front position.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W high filament and a 5W low filament.
The BAY15d bayonet base features two offset pins, which physically prevents incorrect installation of single-filament bulbs that share a similar base style.
The dual-filament design of the 1157 allows the rear side marker to operate at two distinct brightness levels, corresponding to the 21W and 5W filaments respectively.
The 168 and 1157 are not interchangeable, as they differ in base type, wattage, and filament configuration, making front-to-rear substitution incompatible.
Both the 168 and 1157 bulbs carry ANSI designations, indicating they conform to standardized specifications governing electrical and physical properties for the North American market.