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2006-2013 Mazda 3 Oxygen Sensor - Walker Products Inc. W0133-1894340
The oxygen sensor determines the oxygen content of the exhaust gas. Since the amount of oxygen in the exhaust gas is a good indicator of combustion efficiency, it is also the best place to monitor the air fuel ratio. The ceramic sensor body is contained in a housing that protects it against mechanical effects and facilitates mounting. The Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet and exceed all original equipment specifications and test requirements. Their aftermarket replacement for the Mazda 3 oxygen sensor boasts improved engine response and performance, lower emissions, improved fuel economy, and longer sensor life.
The new Downstream oxygen sensor arrived very fast. I wish I would have ordered both sensors at first as now the other is out. I will order again and be very satisfied again I am sure.
I found this product to be very useful the first time I ordered it, getting another one for a different car.