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Not necessarily. I took a look at a supplier and if you have the same engine, the front pipe is the same number. It is very likely that since the car bodies of these two are from the same series first generation Outback, and they have the same engine, the exhaust will interchange.
It may be the heat shields on the exhaust system vibrating.
Oxygen sensors on all cars built in the last 20 years or so are located in the exhaust system. Subaru has them before and after the front catalytic converter.
Cooling system thermostat is at the bottom of the engine. Look for the lower radiator hose and trace it back to where it attaches to the engine block. Bingo!
The Subaru Legacy is unique in its class because it does indeed have a standard all-wheel-drive system (AWD).
Catalytic converters are in the exhaust system so replacing them is a job similar to replacing a muffler. Difference is that the converters are bolted in and have gaskets that must be replaced at the same time.
Remove one battery terminal and touch it to the other to discharge capacitors in the system. Reconnect the terminal and you are good to go. Don't forget to clean the terminal while you have it off.
We'll assume that the hiss was not there before. Could be an exhaust leak or a leak or restriction in the air induction system. Would help to know if you experience the hiss from the driver's seat or outside of the car.
http://www.cars101.com/subaru/keyless.html#code%20alarm Should do it for ya...
Subaru has been building the Legacy Outback since 1995. Many changes in the control systems have occurred over those years. Newer models do not have a separate cruise control system, it is controlled by the ECM. On those models the cruise control is deactivated when the check engine light is on. If you care to provide more information we may be able to assist.
You need to burp the radiator and cooling system.
The Emergency Killswitch in the Subaru Outback is located underneath the drivers-side steering panel. It is to the left of the steering column and looks like an inconspicuous button. Just press that with the keys in the ignition and with the electricity on.