just purchased the O2 sensor for my car online, original, need 2, one at the front and another for the rear. google around, also ask to change after some interval, around 150k km max.
then watch youtube also shown the details, need to change O2 if FC getting worse Youtube

there are 2 sets of O2 sensors for my car, the no 1 is easy cz just beside the engine. I already had the sockets to open the O2 sensor, so now waiting for the delivery of it. The No. 2 is behind or below the engine, might as well send it to a nearby workshop for installation.

SC, not just at much2 premium price, but needs to order and takes 2 weeks for delivery. This for my nearby Honda SC