E estrella101801 Guest Sep 23, 2008 #1 I need to replace these sensors on my truck but I have no idea where to even find them.
V vwihc Guest Sep 23, 2008 #3 Up stream will be anywhere between the headers (engine side of exhaust system) and the catalytic converter. Downstream will be anywhere between the catalytic converter and the tail pipe
Up stream will be anywhere between the headers (engine side of exhaust system) and the catalytic converter. Downstream will be anywhere between the catalytic converter and the tail pipe