Ok I have a 2001 dodge ram 1500 with a 5.2. It is a 4x4 sport oath the off road package. I have the California emissions on my truck, so I have 4 o2 sensors. I have two small pre cats on each exhaust manifold. There are two o2 sensors right above each of theses pre cats and two behind each one. I have been trying to find replacement o2 sensors, but the parts store here in Ohio can't give me any info or a part number. I went to the dealership yesterday and they wanted 454 dollars for the replacement o2s. Any help would be much appreciated.

 

Check out rockauto.com they have a good selection of parts for our trucks, at a good price. Don`t use Bosch 02 sensors, they don`t work well in our trucks, use NTK or Denso 02 sensors.