Up for sale is a Good working Nissan AMM / MAF. Fits the 79-83 280Z 280ZX with electronic fuel injection.  A31622420   -- Match this number with your original. unit is good used with a 30 day functionality warranty from us.  I briefly checked it out with my digital ohm meter, and it works well, flaper output signal is clean and the flap moves 100% freely, not notchy at all.