T rating is good for 118 mph. You planning on going faster than that with snow tires? I would find a new shop. I used to run V rated snow tires on my 545i. They are more like all season tires. If you want a real snow tire you have to have a lower speed rating.

I have these monster mud tires on my 4.6is. Came with them. Trust me, they are not V rated at all.

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2001 E53 X5 3.0 Auto. Silver Black Build date 10-17-2000 141kmiles

2004 E60 545i Sport 6MT. Black/Black Build Date 6-2004 102k miles