Hi, I am new to this forum and this is therefore this is my first post. I drive a 2006 Corolla 2.0 D4d. I am wondering if anyone has experienced a knocking sound/feel from the steering at low speed on uneven surfaces? I have carried out basic checks on ball joints, steering rack, joints on steering column etc and everything seems fine. Might the electric power steering motor be the problem? Any advice on this issue would be greatly appreciated. Many thanks.