Just ordered all new Denso o2 sensors for my 2003 4Runner v8 limited from
RockAuto here’s the part numbers cross referenced with Toyota. SO MUCH CHEAPER than the stealership!
(2) Front Sensors
-Denso 234-4138
-Toyota 89465-60150
Rear Right
-Denso 234-4260
-Toyota 89465-60250
Rear Left
-Denso 234-4261
-Toyota 89465-60200
Got them all shipped to my door for $188