Ok So im going to replace my second passenger O2 sensor and decided to just do the second drivers side also.

I have a 2003 5.4 4x4 Supercrew and was wondering what sensor I need when i looked them up the other day there were a few so im confused as to witch ones I want. Its the back/ second O2 sensor any input would be nice.

Were should I get them from also. like best price.

thank you

 

i believe the back ones are BOSCH Part # 15729

i bought mine for right at 50 a piece at oreilleys

 

i went to the oreilleys here today and they quoted me 75 a piece.

 

damn! i notice your about 3 hours away from me

i have a 2wd 2002 4.6 maybe that has something to do with it?? they should be the same i believe

 

AND you dont really need to change out the rear ones anyways..they dont really need to be changed out

 

yeah, thats cool. and idk maybe, he said they use to be about 40 a piece but just recently went up in price.

 

Well my back pasenger side one is throwing a code. I checked all the wires. No leaks or anything so it's got to be the sensor itself shoring out or something. The dealership said it was most likely the sensor. We shall see.