replace GPS for 2007 CX-7 (comes with an GPS already)

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Mazda, 2017 cx-5, GT
Hello, when I search an after market GPS, I found a lot on ebay and Amazon. Seems all are for the ones come with the stereo System.

My 2007 cx-7 (bought a 2nd hand car) is already comes with an OEM GPS (I googled should be DENSO I guess) and bose system. Are the ports the same at the back?

Can I just buy one and replace it into my car? (The LCD screen is really dark now, I can't see it clearly and the map is out of date.)

Anyone knows this? Thanks
 
well, for the dimmed screen: have tried to increase the brigthness using the on-screen commands?
For the map update: there's a couple solutions on google, without buying the dvd which is $200 from Denso.
As for the ports: do you mean that if you purchase an aftermarket unit will be plug and play? NO. If you want an aftermarket unit you'll need a wiring harness. If you buy the OEM (Manufacturer) unit then yes; it's plug and play.
 
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