mdt821

Hello. I am having similar problem. I bought used 2012 Ford Edge. It had A7 Nav card and worked for about 3 months. Then I got a fault message on card, so I bought a new A7 card. That new card lasted about 2 weeks and got same fault message. I have rebooted and reset system many times. I have the latest version software. Is it the A7 card or is there a recall or issue I do not know about? any help would be greatly appreciated!