I%26#039;m changing oxygen sensor 1 in Bank 1 on my 2004 Hyundai Sonata. I know it is before the catalytic converter, but I%26#039;m not sure which side it%26#039;s on. I just want to make sure that I change the correct one. And I%26#039;d also like to be able to see some kind of diagram that will show me the locations. Thanx!|||You may get the info you need on this site
http://www.hmaservice.com/
Haven%26#039;t been on it in a while but I think it may have diagrams and such.
