Honda Accord 99 - F23A4 Engine
Got ODBII codes P1166 and P1167, so need to replace both my oxygen sensors.
What are some good websites/shops to buy them for cheap online?
I'm planning on buying them myself andthen take the car into a shop to get them replaced.
Should I get the Universal kind or OEM kind?

Thanks!

 

I purchased NGK, but I have heard Denso work well also. Rockauto.com

 

You have the ULEV F23A4 so you need to get "special" wideband O2 sensors. I would try to track down some OEM ones, no aftermarket stuff if possible.

tasauto.com
hondapartscheap.com
hondaautomotiveparts.com