I replaced my diverter valve which was mildly cracked. For the 2.0TSI on the MkVI GTIs, they made a new revision diverter valve that holds more boost and is more durable. I noticed a bit of blow off so that’s why I checked it out. The whole job was relatively easy and simple. However, getting to the 3 bolts is very difficult. I spent about an hour under the car just trying to get the bolts off and then get them back on. The part was cheap at my VW dealer. Have some photos with annotations.

Just to get an idea as to how set in that diverter valve is.

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Was a fun little project.