Subaru Tribeca high beam headlight bulbs use 9005 size, while low beam headlight bulbs use H7 or D1S size specifications. The replacement chart covers 2008 to 2014 model years 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 9005 bulb is an ANSI-standard single-filament halogen type rated at 12V and 65W, fitted with a P20d base. It serves as the high beam headlight bulb across all Subaru Tribeca model years covered in the specifications, spanning 2008-2014.
The H7 is a single-filament halogen bulb operating at 12V and 55W, using a PX26d base. It conforms to the ECE standard but also carries approval for use in the United States and Japan. On the Tribeca, it is the low beam bulb for vehicles equipped with halogen capsule headlamps across the full 2008-2014 range.
The D1S is a high-intensity discharge xenon bulb rated at 85V and 35W, fitted with a PK32d-2 base and an integral ignitor. Its elevated operating voltage and discharge technology distinguish it fundamentally from the halogen types listed alongside it. It is specified for projector-type housings.
The Subaru Tribeca (2008-2014) presents two distinct low beam configurations depending on headlamp type. Halogen capsule headlamp variants use the H7, while HID headlamp variants use the D1S. These two bulbs are not interchangeable, as they differ in base type, operating voltage, and ignition requirements.
The 9005 and H7 bulbs share the same 12V operating voltage but differ in wattage, base type, and regulatory standard. The 9005 draws 65W against the H7's 55W, and their respective P20d and PX26d bases are physically incompatible with each other's sockets.
The D1S bulb's integral ignitor means the high-voltage starting circuit is built directly into the bulb unit itself, as opposed to residing solely in an external ballast. This design is specific to projector-type housings and is not suited to reflector-type headlamp assemblies.
Because the Tribeca's low beam position accommodates either an H7 or a D1S depending on the installed headlamp system, the headlamp housing type must be established before a replacement bulb is selected. Substituting one type for the other is not supported by the specifications.