This is my first post in the 5th gen forum so don't flame me. My mom's car is making a humming noise when driving on the highway. Automatically I figured it was the wheel bearing. When we took it to the mechanic he said that all of the wheel bearings were good and said the noise is coming from the middle of the car. I tried to pinpoint where the sound was coming from and conclude that it was coming from the middle of the car. If it's not the wheel bearings, what could it be?

 

i am having a similar problem, but i am also getting a shake in the front end that caused all 4 of my tires to go out of round (michelin pilot sport a/s with 7k on them) i brought my 03 max to 7 different people and they have no idea.

 

bump......

 

My sister's old autotragic also has humming noise starting at 90 mph. No idea what it is either.

 

You probably have bent wheels. It's a lot more common than people think.

 

i just brought to a rim shop and they were the one's that said, not bent wheels, just 4 out of round tires?

 

With michelins, its highly unlikely that you got 4 out of round tires. Its more likely that you have wheels w/ a little runout from a slight bend. Have them check both just in case.

 

on monday i am going to switch wheels with my buddy and see if his car shakes and if mine rides smooth he has the same tires and wheels and no vibration.

 

just fyi....bad bearings are VERY common on maximas....not saying that's your problem, but it's not unusual.

then again, maybe there's a reason mine go bad all the time (see sig pic)...

 

I too have that sound not tires, thought it was so bought new ones still noise only on one side, wont make the noise on jack stands, grabbed rotor and tried to wiggle it and it wouldnt bearring inthe middle looked good.

 

How often did your "sister" go faster than 90?

 

i recently had all 4 bearings replaced
replaced front struts
replaced front rotors & pads
7 mechanics said front end is tight

 

tight as in?

 

nothing bent or loose

i just had my tires spun on the road force balancer and the shop said that all four tires are wearing perfectly and not out of round, however my car still shakes/vibrates

 

I have the same issue right now: humming noise from the rear from 20mph.
I have Maxima SE 2000, 115K miles, never changed bearings or struts.
Checked rear brakes, all looks good. I have Michelin tires also(60K miles on them, still look Ok, but I am going to change them next week, may be noise is going to go away).