Subaru Tribeca front turn signal bulbs use 2357NA size while rear turn signal bulbs use 1156 size. The replacement chart covers 2008 to 2014 model years with corresponding bulb 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 turn signal positions for all model years covered in the specifications, from 2008-2014.
The front turn signal on the Subaru Tribeca takes the 2357NA bulb across all seven model years listed, from 2008-2014.
The 2357NA is a dual-filament bulb rated at 12V with a wattage split of 26.9W and 8W, meaning it serves two separate lighting functions through a single housing.
The 2357NA features a BAY15d bayonet base, which is an offset-pin base designed to prevent incorrect insertion, as the two pins are positioned at different heights.
The natural amber glass of the 2357NA produces a yellow-orange light output without the need for an amber-tinted lens or housing, which is reflected in the "NA" suffix of the bulb designation.
The rear turn signal across all 2008-2014 model years uses the 1156, a single-filament bulb rated at 12V and 21W, dedicated to one lighting function only.
The 1156 uses a BA15s bayonet base, which has two pins at equal heights, making it a different and incompatible base type from the BAY15d found on the 2357NA front bulb.
Both the 2357NA and 1156 are ANSI-standardized bulbs recognized across the United States and Canada, meaning they conform to a defined set of electrical and physical specifications.
The 1156 and the 2357NA share the same 15mm bayonet base width, but their pin configurations differ, so they are not interchangeable despite the physical similarity in base size.
The dual-filament design of the 2357NA distinguishes it functionally from the single-filament 1156, as the front position requires the bulb to handle more than one circuit.