[JupiterBMW]

P0156- Oxygen sensor Bank 2

Yeah, not thrilled about this, seeing as how I'm away from home for another 45 days and my wife is left to deal with this on her own. Our X5 has about 33k miles on it, a 2010, and she just called me about this code this morning. I looked into sensors, and they are about $310 for the pre-cat and $390 for the post-cat at my local dealer. Less of course with my CCA discount, but I forgot to ask about that. My question is, does anyone have any experience with this, and is there a way to tell if its the pre-cat or post-cat sensor? All she did was run over to the local parts store and get a free scan. Now I at least feel comfortable letting her drive it (albeit at even lower gas mileage!).

Anyway, any experiences or perhaps costs to repair would be really helpful. It appears the sensors are all up top near the turbos (in the downpipes) so hopefully they aren't terribly hard to swap. I've swapped O2 sensors many times before, but the E70 platform is still really new to us...

Thanks for the help folks.