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Where is A/F Ratio Sensor 1 heater bank 1 lean shift located 2005 Nissan Altima 2.5L?

Vehicle: 2005 Nissan Altima 2.5L

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The sensor is in front of the engine on the exhaust manifold. 

See picture below 

Nissan Altima Engine Air/Fuel Ratio and O2 Sensor Location

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