Does anyone know the part # for a heated oxygen sensor?

 

Sure. 89465-39745 is a part number for "a" heated oxygen sensor.

But whether it would fit your vehicle depends on a few things you haven't told us.

 

What do you need to know?

 

1990 4Runner 3VZ-E?

89465-39355

 

Also need to know if you want the upstream or downstream sensor. (usually California only)

 

I thought heated was upstream and sub heated was downstream.

 

That's backwards. If sensor 1(upstream) were located at, or near, the exhaust manifold there would be no need for it to be heated. If sensor 2(downstream) were located after the TWC(not at, or near, the exhaust manifold), then it would need to be heated.

http://www.autoshop101.com/forms/h37.pdf

However, in this case, both would need to be heated. Due to the location of the TWC. Essentially, because they would both be in the "downstream"(not at, or near, the exhaust manifold) position. Since sensor 1 is already located away from the exhaust manifold in the exhaust pipe just before, and upstream of, the TWC. So sensor 2 would need to be located just after, and downstream of, the TWC(even further away from the exhaust manifold).

http://personal.utulsa.edu/~nathan-b...79threeway.pdf

 

I have a used O2 sensor from a 3VZE that was just infront of the cat that i dont need anymore, only like 2yrs old. I'd give it to you for 10 bucks plus S&H

 

I've got a terrible universal O2 sensor you can have if you live near Sacramento