Thanks for the info! So 4 sensors all together. How about for bank 1- which is the passenger side. Two sensors for the passenger side, correct?

 

Which brand do you recommend besides dealer brand! I’ve been told not to buy cheaper ones especially for the sensors.

 

My 2c.don't waste money on non-OEM and only buy from reputable seller.

Salim

 

Any recommendations where to get 02 sensors?! Looked at eBay, but seem to be unbranded.

 

You want real Denso sensors. I have ordered them in the past for other vehicles we own (Jaguar and Subaru). My sources were Amazon and Rockauto. Do your research and be certain you are not ordering fake Denso sensors.

 

Rock Auto is a more reliable source than Amazon to be sure not to get fake parts.

 

Will look for Denso if I can find at a decent price.

How about the brand “Walker”? What do you guys think, is it a reputable/reliable part?

 

Avoid Walker. They are usually outsourced junk for a high price. Their exhaust components are usually made with mild steel instead of 409 stainless like factory stuff so it'll rust before you know it, and their welds and fitment are sloppy, plus the steel they use is thin. Lots of examples on Toyota Nation from Highlander owners. Stick to Denso or as an alternative NTK for budget O2 sensors, don't get Bosch or any of the other brands, our ECUs don't play nice with them. If you do need a new catalytic converter at the end of the day, get a Magnaflow 8" 2.5" in/out diameter 409 stainless cat welded in, don't open up a can of worms by having the manifold taken off if you can avoid it, as there is a good chance studs will snap off and will have to be extracted due to rust.

 

Thanks! Will definitely look for Denso. I guess that’s why Walker is pretty cheap because the quality matches the price.

 

Based on the pic from the scanner, is this the sensor before the catalytic converter or after?