Where is the Air-Fuel ratio (A/F) sensor bank 2 sensor 1 located?

Question

On my 2003 Toyota Highlander 2.4L 4 Cyl where is the Air-Fuel ratio (A/F) sensor bank 2 sensor 1 located?

Answer 1

You have a 4 cylinder engine there is only 2 sensor the one before the catalytic converter is the upstream 02 sensor, the one after is the downstream 02 sensor, If this is a V-6 engine Bank 2 is located at the rear on the firewall this firing order, where cylinder 1 is located is Bank 1 the other side becomes Bank 2