i have a 97 accord 4dr vtec EX 2.2L and i recently had to do a tranny swap (old one locked up on my way home from buying the car ) but while it was in the shop, the diagnostic report showed my O2 sensor as being bad which explains the engine light being on.

I called autozone and they asked me which one? Do I have to know which one or can I just buy any one that fits my car and also if anyone has any DIY guides about installing it as the tranny swap has almost put me in debt.

THANKS IN ADVANCE

 

there is a 'primary' sensor and a 'secondary' sensor after the CAT.[ Monitor sensor]
If you have a copy of the service ticket it might say B1S1, that would mean Bank 1 Sensor 1; the primary sensor.