So oem is pretty pricey. Especially since im not 100% sure its the problem.. And i have a buddy that works at a part store so i could get the ntk for alot less.
But is it worth it? Or just go with oem?
94 22re cali.

 

NTK is the OEM O2 maker for Ford/Mazda and maybe other Japanese cars and Trucks. NTK is a high quality Japanese maker, as Denso is.
I would'nt hesitate to use them in my Toyota, They're what I buy for my Ford Escorts and they give good long service.

Probably the only brand I would buy other than Denso.

 

I use universal Denso and just cut and solder them in. $35/ea work great for years across multiple vehicles.