My OBD2 is old school action, plug it in.

I get it all, but my point is the parts to resolve this are basically cheap and in need of replacement anyhow. So might as well crack on with it. If I get to the end of the trail and still have my lean codes, then yes, I can bring it over to a BMW shop to get a diagnosis for $150.

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2003 X5 3.0i Silver (build 07/03)
2006 X5 3.0i Blue
1977 Ferrari 308 GTB
1994 Ferrari 348TS Speciale #14/15
1989 Ferrari Testarossa