rockauto 02 sensor question

Looking to replace upstream 02 sensor on a 98 tacoma, automatic, V6. On the RockAuto website I'm looking at part #2344153, $47.79. Does this look like the correct part? Also, it lists both upstream and downstream sensors, so I'm not sure really what I'm getting. At this point, I only need the upstream.
Thanks in advance for any suggestions.

 

Is it a Pre-Runner? Normal 2wd? 4wd?

 

Not a prerunner, yes a 4WD.

 

The OEM part number is 89465-39835 for the front o2 sensor on that Tacoma. I looked at RockAuto and their part number 2344162 had the correct Toyota number listed with the part description. I don't know for SURE that it is the correct part, but it seems likely it is.

 

When I get back to my computer I can confirm rockauto's part number for the upstream O2 sensor

I bought one for my 98 4x4 3.4L last year.

 

edit: nvm... just saw you're an automatic. Different part#

There is also a 5% TW member discount coupon on this forum somewhere

 

Thanks for all the replies. Can anyone help me understand why there is both upstream and downstream sensors listed at this price?