FH3 Warthog code didnt give the car

I'm having the same problem. The Warthog was a 10MB file titled "Gift Car Halo Warthog".

I pre-ordered the Ultimate Edition bundle with early access on Sept23 and installed the pre-order download. I then redeemed my code from the message which is still in my XBL messages and the 10MB Gift Car Halo Warthog file appeared in my FH3 manage game
files. Then I downloaded the FH3 Demo and played it, the warthog file simultaneously appeared in my manage game files for the demo and the full game pre-order dowload. I then uninstalled the demo and the warthog file was no longer listed under manage game
for the full game pre-order download. I uninstalled the full game and restarted my console and reinstalled the full game pre-order download and the warthog file is not listed under manage game or ready to install. I then reinstalled the demo and the warthog
file doesn't appear under manage game or ready to install for the demo or the full game pre order download. I checked my purchase history and the warthog code redeem does not appear there. I as well suspect that the issue is that the full game has not yet
launched which is scheduled for Sept27. If the warthog file appears for me upon the start of early access Sept23 I'll try to give an update if this issue is still open. If it does not appear I will wait until Sept27 to give an update.

I had a gift car message in my FH3 inbox earlier & now the Warthog is part of my game. Hopefully that's the case for everyone else shortly.

Check the in-game messages, under gifts. Users on Forza boards are reporting it is showing up there for them now.

forums.forzamotorsport.net/turn10_postst68879p20_Halo-Warthog-in-FH3--codes-in-progress--use-Support-forum-for-redemption-issues.aspx

I have the same issue. I redeemed the code & the Warthog showed in the FH3 pre-order & also in the demo. I uninstalled the demo & the Warthog was removed from the full game installation.

It is not showing up under ready to install for the full game, my code no longer works due to being redeemed, & the Warthog gift car doesn't show up in my purchase history online, although I still have the message in my XBOX Live message history.

I too am not seeing the warthog in FH3 despite having redeemed the code about a week ago. Furthermore, the warthog isn't available to download in the "ready to install" section.