Because it needs grease. If it squeaks or clicks or makes noise it needs replacing. OEM ones may not have a grease fitting, replacements normally do.
There might be a squeaking noise when driving slow in your 2000 Beetle because your suspension needs to be replaced. The squeaking can also come from the universal joint.
probably a universal joint. Or a cv joint depending on what is applicable to your car
it could be a bad universal joint.
The drive shaft universal joint is the most likely culprit. I'd suggest changing both the front and back joints.
Probably a bad u-joint.
a universal joint holder.
Possible failed u-joint.
The first universal joint was created by Londoner Robert Hooke, a scientist of the 17th century.
Check your universal joints!
Yes, a universal joint is a type of lower pair joint that allows for rotational motion between two shafts that are not in line with each other.
Possible failed u-joint.
ball joint or tierod end