yes that is the one i meant no it is federal my plug is like that but the top of the plug where yours has two notches mine has one. the plug you have is what is 234-4162 that is the same as my rear o2 sensor my runner has two cats on it but i think most do as for o2 mine has only two sensors...
I have a 2000 4runner with 3.4 federal emission just bought a new oxygen sensor denso 243-4162 and it is not the one i need i need the front one and according to napa and a few others this is the one but the plug is wrong . so i unpluged the rear and it is the same as the 243-4162 my runner is...
