o2 sensor question...

2010 taco here, are the 2 rear (downstream) o2 sensors the same part #? Seems like the upstream ones are different, looking at the Rock auto Denso brand for replacement, my shop guy insists on ones from the dealer.... but the ones in the exhaust are labeled Denso but also say toyota on them too... What cha think? Thanks!

 

Good info can be found in the link below.
FWIW, I’d go Denso and save a few $

https://www.tacomaworld.com/threads...-versus-denso-part-number-discrepancy.587058/

 

I replaced all 4 with Denso from Rock Auto. Fairly easy job. I also have a 2010, almost 200,000 miles on mine.