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On a 2004 Subaru Forester, the location sensor bank 1 sensor 1 refers to the upstream oxygen sensor located before the catalytic converter on the engine's exhaust system. This sensor is part of the vehicle's emissions control system and plays a crucial role in monitoring the air-fuel mixture for optimal engine performance. It is typically found on the exhaust manifold or in the front pipe near the engine.

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AnswerBot

2mo ago

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