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Coon

oxygen sensor location

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Does anyone know exactly where oxygen sensor bank 1 sensor 1 is located on a 03 toyota highlander? i got a diagram but still not sure if its the one on the front of the engine or the one on the back of the engine down low.

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Bank 1 is always the same side as the number one cylinder. sensor 1 is always upstream of the catalytic converter.

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thanks...what i ended up doing was disconecting the other one and seeing what the tester said..now getting it out is another prob...it only moves about a half turn and stops...guess im going to have to get it in a garage where they can get it on a lift and put some heat to it...

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