Where is o2 sensor sensor 1 bank 1 on 03 Buick Rendezvous?

Question

Where is o2 sensor1 bank1 on an 03 Buick Rendezvous?

Answer 1

HI there

Bank 1 is the bank closest to the firewall, sensor 1 is the sensor before the catalytic converter on that bank. So, it's the first O2 sensor on the rear bank.