I need to change the bank 1 sensor 1 oxygen sensor?

Yes. Here are some guides that will help with this as well:

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Below you will find the process from the manual that will help with replacing these sensors.

Please let us know if you have other questions. Thanks