[mcat2015M4]

Also, if anyone can point me to ANY information on diagnosing the wiring harness side of the MAF sensors it would be greatly appreciated. Anything, voltage readings, ohm readings, anything that give me some confidence the wiring harness side is OK. I've seen some diagnostics online where technician pack pin the wiring harness side of the sensor, doesn't look like that's possible on the BMW connector. I've also captured some data logs using the MHD app, nothing conclusive from the data logs.

One additional question, I have a theory that the extremely high volume of air in the front mount intakes cools the MAF so quickly that it masquerades as a low voltage electrical issue. Does this sound plausible? The low voltage / bad MAF has really thrown me, I keep looking for electrical issues.