New member hoping to find answer to mechanical problem.

[Topcat]

My Q5 is a 2015 Premium Plus S-line with the 3.0 engine. It has 75k miles on it and we bought it new. No accident and serviced regularly. This week it started making roaring sound that gets louder as you increase speed. It's not brakes or wheel bearing or tires. When I coast in neutral the roar is the same. Does anyone have any idea what
could be causing this problem? Thanks for anyone who can help me.