Which O2 Sensors to get?

[JanMatt]

Hey guys, I'm trying to replace my O2 sensors, but I'm kinda confused as to which ones I actually need. The DIY posts that i've seen have said they get the pair for $130-$150. But i'm seeing two different items:

One is like this that goes for like $50-$70 bucks:

http://www.ecstuning.com/BMW-E46-330i-M54_3.0L/ES240368/
To me it just looks like a shorter cable.

Then the other goes for like $120-$150, almost $250-$300 for the pair:
http://www.ecstuning.com/BMW-E46-330i-M54_3.0L/ES261733/

Just wanted to confirm with you guys before i placed the order and stuff. Thanks!

[ELCID86]

Are you doing pre or post-cat. For pre cat you can get two of theses.

21551

21552

The only difference in the two pre-car ones that we can tell is the color of the cable (and price). I got mine from Amazon.

OE ones:

21553


Thumbs, iPhone, TaT.

[Hermes]

Why are you changing them?

[rkneeshaw]

As of yesterday, amazon had a way better price than ECS on the Bosch 17215 and 17216. Should be a touch over $100 shipped.

When checked ECS the other day they were back up to like $200 each.

[JanMatt]

Yes i forgot to mention that they are pre-cat.



Why are you changing them?

Well my SES is on for them, but also i have this stutter between 2.5-3K that might solve it.

Thanks for the help everyone