The plot thickens and I'm so confuseeeeeeeeed.
I keep a detailed paper trail of my service visits. I bought this car brand new/custom ordered so there is no funny business from a previous owner. I thought the MAF was replaced due to a CEL a few years ago but apparently it was something else after looking at the paperwork (replaced oxygen sensor 13-62-7-801-158). There has not since been work done to the car that would require access to the passenger side except maybe to replace the recalled alternator & deflection pulley bolt (though I've changed the belts and an idler pulley without even needing to touch that side of the car).
So as far as I can tell, the MAF is original from the factory.
I took out the little cylinder housing where the MAF sits in and I'm even more confused. I thought maybe a service tech took out the sensor and reinstalled it back on the wrong way. That doesn't seem to be the case as there is a tab on the MAF that prevents it from sliding in upside down as well as being fitted inside out. The part where the MAF touches the tube doesn't seem to have residue from any type of adhesive that may be missing. Nothing seems broken or out of place. There are also no spots that I can see where a screw would go or where a clamp would sit like on most BMWs.
I haven't had the "Hot Air Film Recall" done yet. Is the whole circular assembly along with the MAF replaced? If so, then problem solved and I'll let the recall take care of it. If not, then WUT?
WHAT IS HAPPENING?
Quote:
Originally Posted by ard
you have removed the MAF capsule from the MAF housing...AFAIK, the MAF sensor is the whole thing: the housing plus sensor
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They strangely both have different part numbers (see pic below) but on RealOEM, it looks like one part. I hope the recall has the whole housing and sensor replaced. That would solve the problem (but not the mystery).