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Where is the O2 sensor on a 1999 Mazda Protege?

There are three O2 sensors on the 1999 Mazda Protege.

>Bank 1, Sensor 1 is located in the exhaust manifold

>Bank 1, Sensor 2 is located in the catalytic converter

>Bank 2, Sensor 1 is located in the catalytic converter

*Bank 1 is the side of the engine with cylinder #1.*