how many 02 sensors does an 04 Mazda 6 have

The Mazda 6 oxygen sensor monitors the exhaust system, specifically managing the expended gases. On a Mazda 6, and most other cars, the oxygen sensor can generally be found on the header pipe, sometimes varying between years and models. Follow the exhaust pipe from the header you will find the next one. 2 in total.

hi i have a 2004 gg mazda 6 if the 02 sensors are faulty what problems would i have with the car is blowing white smoke an drinking a lot of oil 4lt a month