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On a 2003 Lexus, the oxygen (O2) sensors are typically located in two main areas: upstream (pre-catalytic converter) and downstream (post-catalytic converter). The upstream O2 sensor is usually found near the exhaust manifold, while the downstream sensor is located further along the exhaust system, after the catalytic converter. Exact placement can vary by model, so it's advisable to consult the vehicle's service manual for specific locations.

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3w ago

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