slipping Power Steering belt , worn or loose .
Turning the steering wheel farthest left or right for a few seconds will cause a loud squealing.
The cause of the squealing sound is because you are turning the steering wheel completely to the right or left
A loose or worn belt. Also check the power steering fluid.
A good woman.
The squealing could be that you need to add power steering fluid. Also you should check the belt that operates the power steering pump, if bad replace it. If the power steering pump is full and the belt is ok, then you may need to replace the power steering pump.
Dust, unevenness.
A loose steering belt could be the problem and so could worn out pump bearings. You could go to the Internet and type in buzzle.com Hope this helped.the website will tell you how to check your car and help guide you.
Squealing in a Renault Megane can be caused by several factors, including worn brake pads, which may squeal when they are due for replacement. Other potential causes include a worn serpentine belt, which can produce a squealing sound when slipping or damaged, or issues with the wheel bearings. Additionally, low fluid levels in power steering or a malfunctioning alternator can also contribute to squealing noises. It's advisable to have a qualified mechanic inspect the vehicle to identify the exact cause.
Missing or mis-firing.
check your wheel bearings
The most common cause is slipping belt
It could be one of the belts. Usually the power steering belt, you can buy belt dressing at an auto parts store. It also might need to be replaced if it's really old. Hope this helps.