Q: Oxygen sensor replacement on 2000 BMW 323Ci

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I need to replace the bank 2 , sensor #1 oxygen sensor on my BMW 2000 323Ci, which is supposed to be easily accessible. I have the new part already. Any step by step instructions, anybody?
(1) Answer
It's before the catalytic converter. Follow the cylinder #1 (the front cyl.) exhaust runner to the cat. converter, that is the Bank 1. Disconnect the electrical connector, remove the O2 sensor, install the new one.
There is one thing that I strongly suggest. Replace both front O2 sensor at B1 and B2 at the same time. This way you keep both Banks in balance.