My car at lower speeds (between 5mph-20 mph) the interior cabin noise is pretty darn loud, my stock tires that I had perviously had feathering on it which caused the same noise I believe but was louder.

So a few months ago I bought some new tires (falkens in front and hankook in the rears) and all was decently good although still not too quiet (still pretty loud but just not as bad as it was before)..

But now I'm noticing it a bit more now to where the interior seems to be humming along with it at these lower speeds (mainly the sunglasses compartment up by the front map lights)? is it just bad tires or could it be something else?

If it were my tires, would it just be the fronts? the rears? or all 4?
The humming more or less seems to happen when I don't push on the gas, and it's just coasting but I could be wrong. Thank you very much in advance!
It's driving me nuts!

PS: I'm not sure if this matters or not, but noise started to get a bit louder now when the temps here dropped . when I first bought these tires it was roughlyl 70-80 degrees out, now it's about an average of 40-50 degrees out, figured I should mention that as well if it can aide in anything at all.

 

When was the last time you had your alignment checked and is your sedan lowered? Sounds like you have two issues, alignment and poor quality rubber. If your alignment is way off that will only enhance the tire quality issue....
Gary

 

alignment sir.

 

I had an alignment done about 1 month after I got the tires put on as well as lowered the car on stock 350z springs.
Thing is though after getting it aligned, it still pulled slightly and I later found out my steering shaft had play in it (steering wheel while driving had play in it while I was driving straight, yet car would remain straight - play was about 1 inch).
after the shaft was tightened down, I then noticed the pull again.

Do you think all I need is just a new alignment?
Thanks Gary and Pwebb!!

 

Not sure the alignment shop you're going to knows their job or how to align your G. They should be communicating with you if your tires are not wearing correctly. My guess is that they're wearing out the inside 1/4s and that's the noise you described....like a Roooooarrr. I had that issue prior to installing the adjustable a-arms. Check closely how your tires are wearing....that's the key!
Gary

 

ask for a print out after they align it.