02 sensors

[00 Ragtop Z]

Are the three O2 sensors the same on the 5.7 l engine? Ay Oreillys they said there are only two, but I know there are three one after each exhaust manifold and one after the cAt. Are all three identical?

I will be installing new Magnaflow direct fit repalcement cats tomorrow, and have decided to just replace all three 02 sensors, but don't want to screw it up. Thanks.

[Rob B (shoebox)]

No, they are not identical. The pre-cat sensors are the same.

[Al 96 Ram Air T/A]

Also, unless I'm just not reading you correctly, you have 4 sensors, not three. You said it yourself: one after each manifold, and one after EACH Cat. You have two cats., not one, so you have 4 sensors.


And like Shoebox said, there are two types of sensors: square connectors and flat connectors (pre cat and post cat).

[00 Ragtop Z]

all installed, and working great no SES lights after 175 miles! biggest problem was 4 broken manifold studs outof six, but GM dealer came through with the studs!!

Biggest headache was that Magnaflow did not include teh gaskets between the manifold and the Cat pipes-two of teh strangest looking gaskets I have ever seen. Had to break to get the gaskets, but again GM came through.

and this was the fiorst major repair I have had beside repalcing teh pinion gear about 60,000 miles ago. Still on the original clutch, and the original brake rotors--guess teh'll go at some point too.

But beyond that, ready for another 136,000 miles!!!!!