LH 2.4 MAF options

I have a 1991 940SE (b230FT) parts car, the PO apparently put a new MAF in it. My 1990 b230F has been stalling at random, its throwing the 121 code for the MAF but it's thrown that one before without any issues. The PN on the 940SE doesn't match what's coming up on vendor websites:

0280213009

Both cars are LH2.4. Can I swap it over?

That’s the wrong PN for the maf, someone installed the wrong one me thinks. Should end in 016 as I recall.

I just checked and the one in the 240 ends in 16: 0280212016

I just did the resistance test and it's measuring 2.8ohms, the book says 2.4-4.0 is the range. It's thrown this code before and the MAF has always checked out. Maybe its too low on the range and gets out of spec when the engine warms up?

The 240 has always passed CA smog, I would think if the MAF wasn't good it wouldn't pass.

There's more to it than just the resistance range. That 009 is definitely not the right one.

Tested both units and they both read 2.8ohms. not sure what the problem is... I'm pretty sure the fuel pump relay is the culprit.... But it's throwing the 121 code.

Calibrations are different between part numbers. Baseline resistance is one of several parts of the component.