I'm about to replace my upstream o2 sensors on my 06 coupe. Was wondering is there a difference in the actual DESIGNS OF TIPS on the sensors? I recently bought a Bosch downstream sensor and when compared to my OEM one it looked completely different...the oem had a probe like tip with slits in it for air to pass and the Bosch had a blunt nose tip with little circle openings on tip. Is there a big difference with this? Also as mentioned before I will be replacing upstream soon so when I'm researching on where to buy these online I'm getting confused and lost. I tried googling it but couldn't fine much

 

Also I barely read AFTER replacing my downstream sensor that people are saying do not mix different brand sensors due to different readings it will send the ecu. Is this true? And I wasted cash on this sensor now

 

I've read some iffy reviews of aftermarket O2 sensors and MAF sensors. I bought a set of used ones for like 60 bucks on eBay and ended up not needing them.

It's pretty unusual to need to replace several of them what kind of problem are you having?

 

I'm losing gas mileage by a lot. Ive had My CEL on for awhile now too. Also I'm in the midst of osiris tune and and had my codes read by the cipher and it's saying both upstream sensors are bad. Thought maybe it could have been my downstream one cuz It was kinda messed up when installing my hi flo cats that's why I changed it out. But I already checked for vacuum leaks and intake/exhaust leaks with no success at all. Also when car is idling at a stop sign I can almost feel the car move by itself cuz it's idling up and down

 

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