Quote:
Originally Posted by JJunkins
I took it in for precaution but I was also getting a smell of something in the cabin ventilation. It couldn't hurt for you to have them look at it.
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The soot (and cabin smell) is EGR from leaky EGR cooler. I had mine replaced a month ago. Smell is gone.
Get the EGR cooler replaced.
I wouldn't be surprised if they at first incorrectly blamed head gasket, then found EGR cooler as the issue. Never heard of head gasket problems on BMW diesels.