Location of o2 sensors on 2006 Mazda Mazda6

I asked the question before and got two different answers. Where is the bank one number o2 sensor located? I got a po131 and po134 codes

Asked by for the 2006 Mazda Mazda6
Like i said before a code does not mean that a part is defective! Also bank # 1 is still where i told you.
Next to the firewall. Dont believe everything a teddy bear tells you!
agree with wetry