Hey, I've a 2001 crewcab with the 4.6. I am needing to replace my o2 sensors and when I got under the truck to look I see that a PO has removed all the cats........ now only pipe.
My question: Do I need to worry about what I put in the rears, or will the stock ones be good to go?

Question #2: Bosch says the BS15717 are for the rear and the BS15664's for the front. Is there any difference between these besides the wire length? I read several guys here have used the cheaper 15717's in both positions. Is that cool?

Thanks for any pointers
Pax

 

no idea on the boschs i used denso's and havnt had any probs at all. i dont like bosch products after using there spark plugs. just my .2 cents

 

i have a question wat about running straights on an 2000 5.4 would it matter if i took the o2 sensors out completely?

 

FYI - Bosch makes the Ford OEM O2's.

 

Without a programmer to turn off the O2's, you will be looking at a CEL constantly and it will run like garbage. An easier solution would be a set of O2 simulators.

 

Replace with the same Bosch OEM sensors. Worth it, they lasted 10yrs another pair will last the same.

 

Thanks guys,

I guess I won't worry about the cats being gone and messing with the downstream O2 sensors.

So does anyone know if the front and the back sensors are the same except for different wire lengths?

Thanks
Pax

 

yeah i know bosch is OEM but after there spark plugs...i know arent OEM i dont like the company. and i had one of there OEM 180 dollar replacement starts go out in under a year. my duralast starter is on its 2nd year already. i hate bosch stuff.

as for the strights the rear o2s you can take out or do the gotts 02 mod. if you just take them out you will most likey have a code