25925-01P01  VOICE WARN UNIT FR / Switch Assy-Voice Warning, French  / Lookup Code 25590

The Nissan part number is 25925-01P01 (audible voice unit - French). 

Try Ericksen Nissan in Canada 866-328-4031 - I've bought several parts from them over the years that I could not get in the US. 

Also try Fish Creek Nissan in Canada 888-925-0040.

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1) N/A
2) https://www.ebay.com/itm/1985-NISSAN-300ZX-AUDIBLE-WARNING-MODULE-ECM-25925-01P00/324197442558

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