Tires are good. No nails, nothing in tires. Wheels are not bent, etc. I can't figure out where and what is making this sound.

I would say above 40mph, I can "feel" the vibration in the car and my pedals. I know it's coming from the driver's side front wheel/area.
The vibration builds up in sound/motion then goes away for a 1/2 second and repeats.
I put the Z on the lift, checked around both, drivers and passenger sides, and didn't notice anything out of the ordinary.

My alignment is in check with camber, caster and toe factory specs.
At my last service (33k mi), the tech said within the next 10k miles, I need to change my pads and possibly machine my rotors. This was my first thought, but when I apply the brakes, everything is normal (no sound, steering wheel doesn't move under hard braking)

Any idea before I make the trek to the dealership?

 

How many miles are on your tires? Mine did that because of cupping on the front tires. Once I replaced the tires, it completely went away. It got very obnoxious to say the least. I had diagnoses of warped rotor, bad wheel bearing, bent rim. None of which were right.

Drive your car through some dust or sand and see what the inside edge of the tire looks like. If it looks "scalloped", you've got the same problem that I had.

 

I'm around 35,000mi. Tires are still original.
I'll try the dust thing.

But it just happened like over night, not a progressive thing over time of the noise/vibrations getting louder and more noticeable.

 

bet its a wheel bearing. put it on the lift again and free spin the wheels see if you hear anything outta the ordinary

 

i had this problem as well and it was the tire for me with the cupping.

 

I actually did this over the weekend. I spun the hub and just heard my pad making a bit of a sound on the rotor. I was told by the tech at my 33k service that my front rotors were a bit warped, but nothing drastic and should be changed/machined by the next 10k miles.

 

I also had this problem . It could be a belt separation . The tires look fine but inside one of the belts let go.

 

hmm, i had this not too long ago and i thought it was cupping too but soon found it to be the wheel bearing. ha idk GL

 

Ok, so it's not the tire.
I have pinpointed it to probably the wheel bearing.
When I drive straight or when I turn right, I hear the sound. But when turning left, I hear/feel nothing.

 

Dropped the car off last night at the dealer. Got a call at work this morning and it's 2 rear wheel bearings. Thank god for powertrain warranty