I don't know if the Q45 uses a key or a digital thing like mercedes is using now but if they use a key it might work.
Although those things cost like 200-400 bux from the dealer. Worth a try if u wanna spend that money for a key i suppose.
I do wish Infiniti would think of these smaller details and get it right the first time... Like our glove box! Can't even fit gloves in there!