Hey guys, are there 2 o2 sensors on the sr20de motor? If i want to replace it, which one should i get. Are those 2 the same sensor with the same plug? thanks

One is located in the front of the car, connecting into the exhaust manifold. The other is under the car near the cat.

They are both the same kind right? What kind of replacement do you guys use, Bosch or OEM?

They are different. The OE is a Bosch.

Hmm if they are different, how come they only have 1 part # at the parts store? Weird