i am sure everyone will know by now
KNOCKING NOISE = STEERING RACK SPOILT
But do you know there are other components in the steering system as well that you might have to repair also if the knocking noise still persist.
This is the steering column this is connected by the steering coupling or intermediate shaft to the steering rack do get this replaced too if you need. (Bellow is a drawing for better illustration)
Customer came to get his Hyundai Avante DU41 Steering Column / Steering Motor replaced as he was still having knocking noise even after changing his steering rack at another shop.
Pioneers in driveshaft and steering rack technology