is there a difference between the front and rear o2 sensors? i would imagine they would be, but i'm not really sure. or would i just order 4 of the same things and put em in, in any of the 4 locations?

 

The difference in part #'s is harness length. Same sensor, duty changes @ the vehicle side of the harness.

 

well, i have to buy extension harness's anyways...so that means it doesn't matter which ones?

 

You still need longer wires for the rears.

 

Just purchase the correct sensors and you won't need extensions. You need at least 17's for the front with LT's. 17's = a 14" harness. The rears are OEM, unless you relocated.

 

the rears are relocated. i've heard good things about the bosch sensors. any word on any other brands?

 

Bosch or Motorcraft. Both are OEM. So, either or.

 

alright, went with the motor craft sensors. very pleased. the bbk extensions are awesome. with my relocated rears i could only get one hooked up. and instead of cutting and splicing my brand new harness. i've gotten in good with my shop, so I'm getting the sensor bung moved. but no more 135 an 155 code thrown. very happy.

 

excellent