2007-08-14 00:47:11

This is a wiring diagram for using a universal Bosch O2 sensor (Part number 15733) as 
a replacement for the stupidly expensive OEM ones found in federal and California 2000 Miatas. 

Cut off the plug from your old O2 sensor and crimp the Bosch sensor's wires like so:

                 CRIMPS
                 BELONG
                  HERE
                   |
                  \|/

      +---BLACK1--> <--WHITE1--            /- Polarity doesn't matter for
     /                          \         <-- the plug:black and sensor:white wires 
     +----BLACK2--> <--WHITE2---+          \- just do plug:black to sensor:white twice
PLUG=|                          |=SENSOR
     +----BLUE----> <--BLACK----+
     \                         /
      +---WHITE---> <--GREY---+

Shout out to Bob (POPSTOY) from miata.net for helping my Dad...

-Chris