I have a 1992 400.. Bought some universal Bosch 02 sensors, but the color code wires doesnt match the factory.. Anyone done this? Just need to know which wires to which factory color. The Bosch has 2 white, 1 black, and 1 gray, my car has 2 black, 1 white, and 1 blue. Thanks

 

If I remeber off the top of my head correctly:

blue is heater
gray is signal
black is ground.

what does bosch say there is for?

 

bosch O2 sensor

black with blue ----- signal
grey with white ----ground
white with black ----heater
white with black --- heater

 

Thats it man.. Got it..

Working on the driver side, I couldnt budge it.. Its in there.. I broke 2 swivels, and an extension trying to get it loose. I even tried some heat, with a small propane bottle not acetylene..

Any ideas?