Nothing yet for me either.
Did anyone get their BMW Coupe for Xbox one? I redeemed my code and it was accepted on Xbox.com but never got anything in my game.
Here's my 4 extra codes. Follow the instructions in the above post to redeem. Enjoy.
NPJK7-5PKU5-83P8R-RRXKR-82R5X
NPJN3-P675X-NRTR5-5X5KN-RRR6X
NPJNP-U3786-U7XJ2-K48TX-JX73X
NPJRR-4M82N-U6TU5-8UJR4-4KJRX