I have a 2005 Mazda 6s. It has four O2s. One in each exhaust manifold and one just below each catalytic converter connected to each exhaust manifold. Simply said 2 behind the radiator and 2 in front of the firewall. Have fun. If you didn't know, the 2005 Mazda 6s (V6) has four catalytic converters. One on each exhaust manifold and two more before the muffler. Go figure!
6
four
4
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If it's a V-6 engine it will have 2.
( 2 sensors ) - # 6 fuse - 15 amp - HEGO sensors ( in the fuse panel in the drivers end of the dash )
If you have a 4 cylinder engine, you will have two. On a 6 cylinder, you will have four.
Assuming you have the V-6 engine, it has two downstream (after the cats) O2 sensors and two upstream (before the cats) Air/Fuel Ratio Sensors. So the answer to your question is two O2 sensors.
A Mazda 6 s requires 6 plugs, A Mazda 6 i requires 4
Mine is an automatic and it has 3. one on each exhaust manifold and one after the cat.
Your engine will have 4 O2 sensors. And all of them will have a different part #, because the connectors are all different.
In the 2005 Mazda 6, airbag sensors are typically located in several key areas. The primary sensors are found in the front crash zone, mounted to the front bumper reinforcement or frame. Additional sensors may be located in the side impact areas, such as the door frames or pillars, and in the vehicle's control module. For specific details or locations, it's best to consult the vehicle's service manual.