BBro420, I actually bought it from another Mazdas247 forum member who traded in his CX-9 for a new Dodge Durango (shame I know, I scolded him).
He thankfully took his accessory mirror off first and then traded the car in. Out of the goodness of his heart he sold it to me for 75.00 shipped. Needless to say I was extremely grateful.
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The GT's now do come with the homelink mirror, but in 08 it was an "option" for mine which was msrp 39k new. Rediculous.
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It was "used"
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I also purchased the oem installation kit on eBay for 25.00 free shipping.
There are still install kits on eBay for 25.00 oem.
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Be advised, the exact mirror you need is the 000 8C Z02. That is universal for the CX-9 with or without rain sensing wipers.
However, the install kit is specific to rain sensors, you need the kit for your specific application, either with, or without rain sensor, whichever applies to you.
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You can find the Z02 mirror on eBay. DO NOT BUY A MIRROR UNLESS EITHER THE DESCRIPTION SAYS IT IS 000 8C Z02, OR YOU SEE A PHOTO OF THE BACK SIDE OF THE MIRROR, AND TOWARDS THE BOTTOM OF THE MOLDED PRINT, YOU SEE THAT PART NUMBER.
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There are mirrors that look exactly the same, but will not fit TRUST ME. I had a salvage vendor almost send me one that was for a "CX-9" and then after confirming the vin number off the car it came from, it was off a CX-5 which is not compatible. The interchangeability of this mirror is very very specific, it will fit some other Mazdas, specific years, and most of those cars are specific to "with" or "without" rain sensor. However on the CX-9, the 000 8C Z02 mirror applies to either with or without rain sensor, doesn't matter.
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Again, you must confirm that part number before buying it or you will be sorry. I had a huge fight with another salvage vendor that straight up lied to me about it coming off a cx-9... they would not confirm the part number for me but swore up and down it was off a CX-9.... sure enough, when it arrived, it was the wrong application.
You have to confirm that part number.
Good luck!!