(BHA4-37-140) Metal
(BDGF-37-140) rubber
Both work. I had a 2017 and now a 2021 where my winters had the metal stems and are working perfectly fine.
I believe the changeover happened for 2021 Model year.
As you are in Canada with snow, I'd say the rubber stems are better as the mounting nuts...
Crystal Soul Red is a Tri-coat paint formulation.
Read more about it here: https://www.mazda.ca/en/inside-mazda/soul-red-crystal/
The problem with the color is that it seems to show chips and scratches in the clear coat more than any other color.
OP had stated "but what has me puzzled the...
Signature Wheels are painted in Hyper Silver (3- stage paint - Black base, translucent silver color then clear). I believe the GTR use just the standard Silver paint on most wheels.
Dealership does not sell touch up paint for the wheels.
Since the area is so small, you'd get away with using...
We too also had a 2017 and now a 2021 and have noticed the tweaks with BSM. As stated above, they seem to have calibrated the unit to be less sensitive in my opinion.
Given the false alerts I had in the 2017, I've learnt to never trust BSM and still rely on the over the shoulder checking...
There are certain colors that show the stone chips more than others. There really is no difference with the color of the paint and chipping. If you drive on the highway, you're prone to get stone chips more so that if you are just driving around town at lower speeds.
Give yourself distance...
While I agree you should go back to the dealership as they initially did the install, perhaps a second opinion from a dedicated Tire shop if all else fails and you're not getting anywhere with the dealership.
Tire shops deal with one thing alone while the dealership may not have the specialty...