Guitario

Hi Guys! This is my first post so sorry if its in the wrong place just trying to get som advice. Ive just bought a very tidy T REG Audi A3 1.8T and when test driving it was perfect didn't miss a beat. After taking it out a few times and driving a little harder I noticed it knocks when turning left (especially noticeable on roundabouts). I've done a little research which suggest that I may need to replace the antiroll bar link? Does this sound right before it under goes the repair? Or is there anything else it may be? Its just passed the mot with flying colours. Only advisory is the rear coils. Also is there anything else I should think about replacing? Its having a service but is there anything that usually goes on A3's? Appreciate any input. Thanks.