Drop Links - replace one or both?

[Andydevon]

Hi all after looking into a knocking on my Mk5 Golf low speed bumps I have found movement in the off side drop link. Easy to replace but is it best practice to do both sides at the same time? Delph units £21 each so not significant money.

Advice gratefully received.

 

[Burnerman]

I just replace the faulty one......just like springs really! No need to do the other side of it is quiet, just use a quality brand such as Bilstein.
John