Hi ))
Yes, this is a pretty common issue on VW/Audi 2.0L engines. Typical symptoms are rough idle, hissing/vacuum leak sounds, check engine light, and sometimes reduced power. In many cases, replacing the membrane fixes it if the housing is still in good shape, but if the valve body is cracked or heavily worn, the full assembly is usually the safer long-term option. I’d recommend checking KLIFEX https://klifex.net/products/intake-manifold-vacuum-valve-membrane-vw-audi-2-0l-06l133201et-06l133201bb  — they often have reliable intake and vacuum system parts for VW/Audi, and it’s easier to compare membrane kits vs complete assemblies there. Installation is usually straightforward, just be careful with seals and connections.