I found out from a Mazda Technical Bulletin that a Mechanic friend got me, that the SD card in my 2017 Mazda 3 was Manufactured faulty. Mazda knew from at least 2018 but told no one as it's not a safety issue. I had minor problems with the Nav Mode but it didn't bother me as my phone GPS was more accurate so I used that. The fault became worse over time effecting radio selections and reverse camera. Mazda stealership wanted $500 to repair as my car was just outside the 3 year 36,000 mile warranty. When I found out about the Technical Bulletin I pointed out that they knew it was faulty way back in January 2018 and my car was less than a year old at that point. Made no difference, they weren't interested. Called Mazda Corporate, same response!
Found the up to date SD card for 2021 on Amazon, $70.00. Took a chance, installed it in 15 seconds. Works perfect!
Mazda stealership wanted $500.00, so much for "after we sell, we serve!
That's my 4th purchased new Mazda, I'll never buy another one!