The very first part of the suspension that fails is the stabilizer struts. A strong knock on the undercarriage can only be due to this small part. Let's try to restore the ball stabilizer tip with our own hands following the instructions from the video.
Why climb into this unit if you can buy a new part?
1. spare parts are not available, it will not come soon "on order";
2. high price;
3. A fairly simple process of restoring an old part with your own hands.