Hey guys I wanna know whats ur experience and thoughts on the Bosch O2 sensors, I am asking this because I had to replace my headers and the old sensor wouldnt come off so I had to run to the parts store to get 1, I notice a difference between the parts store sensor and the OEM ONE, like my Denso O2 sensor has a bunch of holes on the side and the Bosch 1 has em only on the bottom plus Ive notice my car is wasting more gas than it use to can it be because of the new Bosch sensor i put on?

 

02 sensor is fine. typically ngk or denso is the prefered but the bosch units seems to work just fine. i tested one on a wideband versus a denso and they were identical

something else caused your fuel issue. the header, unplugging the battery and not driving 100 miles or so for the ecu to set fuel trims etc

 

But b4 i changed the sensor I had grat gas mileage now my car is bad on gas

 

could be an off sensor. they are all of 30-40 bucks shipped for an ngk or denso off amazon or rockauto.

order one up and see what happens.

an exhaust leak from this new header would be my first suspect. any air that enters before the o2 will make the sensor read lean and richen the mixture there by killing your mpg

 

Your probably right because i hear a little rattle from the bottom of my car when i move it slow or let it sit idle ima check that out to see if thats causing it and if not ill order a denso and c if it makes any changes, thanks bud