83 280zx ECU A11 654 806
 

WTB 83 280zx ECU A11 564 806, NA automatic transmission. Thanks Mark
PM me or email: designplus@bellsouth.net

If nobody here has one, check out car-part.com. Sort search results by distance from your zip code. Recyclers usually don't want to warranty electrical/electronic parts but you can sometimes make a different arrangement. You don't say how you know your prob is the ECU - but they aren't too pricey to give it a try. There is also a list of ECU serial numbers at resources:z31_ecu_list [Z31.com] but it doesn't go back to '83. :009: Maybe there's a similar list out there where you can cross check your serial number to be sure :slywink:

ECU na zx
 

ecu.