So I need to finally replace these upstream O2 sensors. I get onto
www.sparkplugs.com and find two part#'s. They are:
Denso OE identical O2 sensor 234-4045 234-4045 FRONT $39.70
Denso OE identical O2 sensor 234-4610 234-4610 REAR $39.56
As you can see, they're labeled front & rear. Does front mean front bank, or upstream O2 sensors? I need the upstreams, as my downstreams are fairly new, and turned off through my tune anyway. Can I assume that I need 2 front sensors?
Mark
