Why does my Audi A4 make a high-pitched squealing noise when turning?

I've noticed a high-pitched squealing noise coming from my Audi A4 whenever I turn the steering wheel, especially at low speeds. It seems to be coming from under the hood. What could be causing this issue and how can I fix it?

It sounds like your power steering fluid may be low. Check your fluid levels and top up as necessary. If the problem persists, it could point to a larger issue with your power steering system that will require professional assistance from a mechanic.

Another possibility could be worn or damaged belts. Over time, belts can become loose or cracked, causing them to make noise when under tension. Have a professional inspect your belts for any signs of wear and tear.

In some cases, the noise may be coming from the wheel bearings. If the noise changes or goes away when turning in a specific direction, this could be a sign that the wheel bearings need to be replaced. Have a mechanic check your bearings for any signs of wear or damage.