Hey guys I posted a while ago about this, now I'm getting around to actually fixing the problem. My mini is throwing the code that the o2 sensors need replacement. There are two I'm pretty sure i've read, and that both should be replaced at the same time. I've done some looking around and I found these
http://www.partsgeek.com/catalog/200...en_sensor.html
The top two are what I was looking at buying, one "upstream" and one "downstream". It appears to be the right part but I just want to make sure.

 

Oxygen Sensor Part # 11780872674 Recommended to replace at the same time.

http://www.ecstuning.com/Search/SiteSearch/11780872674/



The part is the same for front and rear position ( one front & one rear ). We have the part right here with the correct connection cables ( clip in and clip out ) for the one end. Watch some aftermarkets as they have to be spliced into.

There a little white clip that holds the one plug in place, at the clips, and the other has a little bracket.
The new ones we have come pre greased on the threads only with anti-seize. Watch so you don't get any on the head of the sensor, while installing.

Good luck on the install.

 

Use the NTK sensor listed in your link; it is an exact replacement for the OEM sensor. DO NOT use the universal Bosch ones, they will give you fault codes. As ECS said, front and rear sensors are the same. you likely only need the front one as it is the one that gets all the abuse.