LED manufacturing tech changes with production runs. If you inhabit fora like candlepowerforums, you'll see that LED tint vary all the time, and some people are driven nuts by this. Mazda has no realistic way to control this. They would have to measure the tint for every LED assembly. No manufacturer would do this, because you, the buyer, would have to pay, and refuse to pay, for a light assembly that would cost hundreds of dollars more than it already does.
(hand) we supply architectural lighting, so you're saying when a designer specify a 4000k wall lamps in a hotel CORRIDOR, we could install various color temps just because LED factories can't control production lines. That's a cool excuse sir! Well noted, Thank you!
Just to be clear right stock is at 7000k-ish while the newly installed one is at 4500k range.