Is there a difference in front and rear o2 sensors? Why is the price for the rear so much more expensive than the front? Will it make a DIFFERENCE if i buy a front O2 sensor for the rear? or do i have to get a REAR o2 sensor for the rear? Please help!

 

I don't have a car with two, but one should be a heated 4wire, and one like a 1 or 2 wire? Look at both of them, look at the plugs, and wires. If they are different, which if one is more expensive than the other that's probably the case, then you would need a direct replacement.

 

they are both 4wire oxygen sensors.