I have a 2004 g35 sedan, rebuilt the entire front suspension last month, changed all fluids except differential. It has 174k miles on it...I'm getting a buzzing or humming noise while I'm driving. Thought it was poor tire tread, got new tires and it didn't fix it. Only happens while moving..does anyone know what this might be? Anyone else have this issue? Any responses would be appreciated. Love the car so far!!

 

Possible wheel bearing, is it more prominent on one side? Change with speed or stays constant?

 

check the rear view mirror. I know it sounds weird, but the plastic around the mirror can buzz when moving.

 

Also check the rims for brake dust and which one's might have it. Could have something to do with your brakes something catching or what not, just guessing though. The reason I stated this cuz I have a similar thing happening to my car and looked at my rims yesterday and the left rear wheel (thought it was coming from the right rear) had excessive brake dust on it and I know something is up with my left side. Probably just needs a brake adjustment or what not on mine for I had a brake job done a few months ago.

 

Yeah that's what I'm thinking. It changes with speed, gets a little louder as I get to highway speeds. Replaced the front hub/bearing along with all the compression rods and transverse links. I know it's coming from the rear but I don't want to just start replacing parts blindly. Rear brakes were just done as well.

 

Go to a shop and throw it on a lift. Some shops have free brake inspections and check more than that with the wheels off, and let the mechanic know what's going on. They usually don't charge anything until you buy parts and get service done. Doesn't hurt to get other techs advice.