Navigation SD Card replacement

2009 Mazdaspeed3
I see other posts about he navigation SD card but not exactly the question I have or the information I'm looking for.
I have a 2016.5 CX-5. Navigation is non-functional, the dealership recommends getting the latest updated SD card withe all the latest nav maps/software they offer, $399.95.

Doing a little research I see many cards for sale 3rd party, eBay, Amazon. I also see some comments about cards being locked to a specific vehicle, but I don't fully understand how to verify if this will be a concern.
Trying to determine if these cards will work on my car and hopefully solve the issue. Many are $35-60, which is obviously much smarter than spending $399 a Mazda. Thanks for any tips.
2019 CX-5 GTR
the NAV cards that are for sale on Amazon / Ebay are new, and removed from vehicles that were destined for other regions. Once you insert the NAV card into your vehicle and drive for ~50 miles I believe it becomes locked to your vehicle.

use a seller on Ebay with high ratings; use Ebay buyer protection.

You will be fine for the $35 experiment. Thought I might suggest reading the thread about cleaning the SD card.

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Ottawa, Ontario
17 Mazda 6 GT
the dealership recommends getting the latest updated SD card withe all the latest nav maps/software they offer, $399.95.
Can't get over the fact that Mazda can justify charging that much for the SD card.
Highway robbery.
Go third party for sure.


The man, the myth, the legend
Land of Cleve
2016.5 CX5
My Mazda 6 buddy bought one on Ebay. Works flawlessly. She paid like $80. That was 3 years ago though.
'20 CX-5 GT PP AWD
I bought a card from eBay for 50 bucks for my '20 GT, an "L" if I remember correctly, and it worked fine for a month then went belly up for no discernable reason. It wouldn't even show up on my computer, it was just dead. So I bought another one for 37 bucks that's an "M" and it works fine. The cards are supposed to have the free 3 year update but I'm a little skeptical about that working, time will tell. But even if you have to buy a new one every year - assuming it comes with the latest map version - you're still way ahead of the 400 bucks Mazda gets.

As an editorial comment, I don't see how Mazda can sell any model that comes with the HUD and not have the GPS as part of the deal. For me a big part of the HUD is to have the GPS info right up front, which you don't get using Apple or Android as your GPS. Just my .02...
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2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
I bought a NAV card from Amazon for my MX-5, $80 at that time. The card did nothing when I inserted it in the car's reader, nothing. The card wasn't recognized at all.

I contacted the seller on Amazon and told him of the issue. The seller asked me to disconnect my battery and try it again. I was quite certain that disconnecting the battery wasn't going to change a thing so I told him that I tried that and nothing changed. He sent me out another card, it looked identical to the first card but it worked perfectly. I was even able to update the NAV software using Mazda Toolbox after driving the required number of miles to mate the card to my car. I have two more updates available (according to the Toolbox) before it expires sometime next year.