Welcome to 2CarPros.
The new calipers should simply be clean. Because of dirt and debris from the road, calipers get dirty fast.
You should be able to look through the wheel to see them. I attached a picture of what one looks like for you to see. The easiest thing to do is remove a wheel so you can get a clear picture of the caliper. If you can, upload a picture for me to see.
Let me know if you have other questions.
Image (Click to make bigger)
Thursday, February 18th, 2021 AT 5:49 PM