That is obd fusion app.

I'm sitting here thinking. I can't recall when I actually swapped the MAF last time. It might have been after the faulty fuel pressure regulator was in, so maybe that's why the car stalled after swapping the MAF and I assumed that, well - it's not my MAF. And put the old MAF back in. I'm not trying to poach parts long term from my 80k miles 2006. Just wanted to test.

So now the MAF is swapped. Will be interesting to see if it stalls again or I get the rich codes.

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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