Is the right O2 sensor on a '94 Mazda 626 es with a 2.5 6cyl on the front or rear manifold?
You did not specify which O2 sensor it is. Is it sensor 1 bank
1, sensor 2 bank 2, sensor 2 bank 1, or sensor 1 bank 2. There are
four O2 sensors on a mazda 626