my car is a obd2 d14z2 ej9 which has 2 sensors at the exhaust way one on ex mani and one on where used to be a catalytic conv.
the 2nd sensor is dead now and i'm going to replace it but its very expensive where i live..
--my question is can i use a bosch o2 sensor cause i get it very cheap from a friend he says it wont be a problem but im not sure

 

as long as it's not a 5 wire o2 sensor it should be fine.

 

go to the junk yard pull one

 

i'm in europe and the junkyard guys are bastards here... i found one in junkyard and its about 150$ and the bosch one from my friend is 40$ i gotta look for how many pins it has

 

They are $78 new here.

 

where in europe are you? if you are in Germany check bamberg junkyard the have 3 eg hatch there might get lucky, next time I am in that area they will be gone.