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Hi guys, I am getting 273E code for bank 1. Deleted few times but it is coming back. I have found two different part numbers 11787836394 and 783639403. Looking by the numbers pricing range anything between €60 to €200?, and all fit M5/M6 e60/63 ?? My question , which one is correct?
Thanks for your help.
 

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Also, check the fuse at the top-left corner under the hood. Recently spent 3-4 hours diagnosing those codes before I thought (or realized) they were fused circuits. You can use INPA to see if they're providing feedback outside of allowed tolerances (time to replace) or no feedback at all (points to fuse/circuit). Thirdly, you can ohm test the sensors themselves and compare values between them for further validation.

It's not always as easy (or necessary) to throw parts at it, good diagnosis reigns king.
 
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