The only place I can think of that uses this nomenclature is the check engine coding having to do with oxygen sensors. This is irrelevant since there are not separate exhausts, assuming this is a 4 cylinder engine. You only got one bank.
In a 2002 Subaru Outback H6, bank 2 refers to the side of the engine that contains the rear cylinders. Since the H6 engine is a horizontally opposed six-cylinder engine, bank 2 is typically considered the passenger side of the vehicle. Conversely, bank 1 would be the driver's side.
On a 2005 Subaru Outback, bank 1 refers to the side of the engine that contains cylinder number one. For the 2.5L flat-four engine, bank 1 is typically on the driver's side of the vehicle. If you have a 3.0L flat-six engine, bank 1 is the side that includes the first cylinder, which is also on the driver's side. You can access it by opening the hood and locating the engine.
Right Hand Side (passenger side)...
On a 2005 Subaru Outback, Bank 2 Sensor 1 is located on the exhaust system, specifically on the passenger side of the engine. It is positioned upstream of the catalytic converter, before the exhaust gases enter the catalytic converter. This sensor measures the oxygen content in the exhaust gases to help optimize engine performance and emissions.
It is located on the engine block drivers side.
in the engine bay. Passenger side. Near the strut tower.
It's on the right front side of the engine and accessible from under the car.
In a 2004 Subaru Outback, the thermostat is located on the bottom of the engine on the driver's side. Remove the screws holding the fitting that the hose (from the bottom of the radiator leading to the engine block) is attached to, remove the fitting, and the thermostat will be underneath.
left side engine compartment . follow battery cables to the starter
Engine serial number is on the rear of the engine top left side. Illustration appears to be on the flange that bolts to the transmission.
The flasher on the Subaru Outback is located on the left side of the steering column and under the column itself. It is a square of about one inch on each side.
You can find the knock sensor on the top side of the engine under the intake manifold. It is easiest to find from the driver's side and is at the back of the engine block.