it may be your tire alignment. your tires may need to be re-aligned. a couple of months ago my car started making a rattling noise when we would go about 70 mph on the highway. we found out are tires needed to be aligned again.
usually a loose bolt
Depends on where the noise is whats making the noise. Can you be more descriptive of where and what?
The batter is low
There are a number of causes for a rattling noise that occurs in a car. These include low oil and an engine that is faulty or going out.
You can use a car noise database to compare noises at mycarmakesnoise.com
sounds like the cv joints need replaced
your Imagination.... :)
bad transfer case
Could be a wheel bearing/hub going bad.
You might want to have the CV joints checked. When bearings start to go out, they make a "clicking" or "rattling" noise while driving - especially while making turns.
it does that because it has a generator which makes the engine makes these sounds
it means your brake pads are worn out and need to be replaced