SixxiA New member Mar 14, 2010 #1 Looking for info on where the upstream and downstream O2 sensors are on the 2nd gen 4runner with the 3.0
Looking for info on where the upstream and downstream O2 sensors are on the 2nd gen 4runner with the 3.0
fourwd1 Moderator Mar 14, 2010 #2 Upstream is front/engine side of converter, downstream is muffler side.
