I’m currently deciding/planning on doing O2 sensors all around, and AB is $270 for all 4. That seems a little nuts, but it’s for the Walker brand and I can’t really find the Walker’s elsewhere, but based on how cheap Amazonia has them (for no name brands- and I’m scared to get non names for the O2 sensors), I think it’s a bit ridiculous.

I’ve never had bad luck with Rock Auto, but I research the heck out of stuff before I order from them. Years ago, I did a fuel pump from them and it was a mirror image of the OEM one that came out and was perfect until I sold the vehicle.

 

I'd avoid Walker o2 sensors. One of mine crapped out after just 6 months. If you look at older o2 sensor threads, Walker and Bosch are considered poor quality. The best quality sensors are the brand NTK, which you can find on eBay for reasonable prices.

This is the front sensor for example: https://www.ebay.com/itm/124491089407

o2 sensors seem to be one of the few electronic D2 parts where avoiding Bosch is actually a good choice.

 

Avoid Walker at all cost. I've had good luck with my Bosch ones.

 

I also had a walker O2 sensor fail after a few months. You can get the Bosch ones from rockauto for $50 each. https://www.rockauto.com/en/moreinfo...=5132&jsn=1047 Its probably a bad idea to get no-name O2 sensors. You also dont need to replace the rear ones unless it is throwing a code since the only thing they do is tell you if the catalytic convertors are bad.

 

Thanks for the feedback guys. I’ll look around and I remember reading the NTK were good to go with.