^I'm not sure, I don't believe so. I was using Carly which gives BMW codes rather than "P" codes. It was code 2c9f for post cat heater element failure. Not sure what the corresponding P code would be.

So far the spliced in sensor is keeping the CEL at bay, but admittedly I have driven it much so there could be a pending code.

Edit: CEL came back after ~60 miles of driving today... doesn't surprise me. It wasn't a big effort to swap the old o2 sensor in so figured I'd give it a shot. I've got a couple of Bosch 15733's coming in for the post cats and already have the two pre cats here ready to go in. Oh well, it was worth a shot to keep that light off as I hate CELs.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)