Hello everyone, currently my car requires two oxygen sensor's both of them does not give a resistance anymore and make the foult to appear. I have another 2 two that i used before but the voltage they give me when heated is too low and their are bad aswell! I have 4 another sensors and they good, but all them 4 are for the very back of the engine, and i don't know if i can to shorten them and put on the closer to cyl 1 bank 1? Are they give the same voltage and has same resistance? I am also looking where could i buy them new is there any good location to get them? Toyota wants 600 Euro its a bit not in my price range. Other part shop's looking 300euro but don't know if they are any good. Thank you for any info provided.