I found no mention of a Power Steering filter in the owner's manual or in the service manual for Outback.
There is no Power Steering Filter on a 2002 Subaru Legacy/Outback.
http://www.cars101.com/subaru/airfiltration.html#00-04legacy
10 minutes or less
The Subaru Outback fuel filter is located inside of the fuel tank. Changing the fuel filter can be very costly and time-consuming.
where would you find out if the Air Conditioner filter is blocked on a 2005 Subaru Outback
The cabin filter in a 2006 Subaru Outback is located behind the glove compartment. To access it, you need to open the glove compartment, remove the stop arm, and gently lower the compartment down. Once lowered, you can find the filter cover, which can be removed to replace the cabin filter.
The filter is in the fuel tank , and accessed thru a panel under the rear seats. They last at least 100,000 mi.
To change the cabin filter in a 2002 Subaru Outback, first locate the filter compartment behind the glove box. Remove the contents of the glove box, then unclip the side stops to allow it to drop down. Take out the old filter and replace it with the new one, ensuring the airflow direction matches the markings on the filter. Reassemble the glove box by reversing the steps.
There should be a black box located on the left, inside your engine bay, mine's made out of plastic, your air filter should be located in there.
On a 2002 Subaru Impreza Outback Sport, the fuel filter is typically located along the fuel line, beneath the car, near the driver's side rear wheel. It is mounted on the chassis and can be accessed by lifting the vehicle. Always ensure to relieve the fuel system pressure before attempting to replace the filter for safety.
See "Replacing an Air Filter" under "Air Filtration System" on page 15 of chapter 4 "Climate Control" in your "OWNER'S MANUAL".....
To replace the fuel filter in a Subaru Outback, first ensure the vehicle is off and the fuel system is depressurized by removing the fuel pump relay and starting the engine until it stalls. Then, locate the fuel filter, usually found along the fuel lines under the vehicle. Disconnect the fuel lines from the filter using appropriate tools, and remove the old filter. Install the new filter in the same orientation, reconnect the fuel lines, and reinsert the fuel pump relay before starting the vehicle to check for leaks.