my two o2 sensor nuts are apparently missing and i cant figure out what size nut it'll take. i tried metric and standard fine and coarse thread...i do not know if these are the original bolts but i will assume they are. can someone please tell me what size nut i need?

 

m8 x 1.25

12mm hex

you can buy them from the dealer if you want the ones with flanges and built-in locking function.

 

How much are they at the dealer?

 

They are a few bucks. I bought two new studs and two new locking nuts from the stealer.

Small price to pay for the convenience..

 

I had one nut on there and on my way to inspection I slowly wound the truck up to clear out the exhaust and all of a sudden it started to sound like a race car. Sounded pretty cool. I pulled over and the other nut was gone and the sensor was spit out and hanging there. It's been held on with wire for the past few weeks. I wonder what that does for my mpg's along with the other exhaust leak(s).

 

Im going to guess if you put it on a graph...it would look something like the economy and stock market on the same graph...

 

I heard lowering backpressure increases power and mileage.