Mk4 Golf 1.8T 2004, has an issue with a consistent check engine light probably having to deal with this. These tubes coming from the fuel injection system I believe had been open.
Ramair intake kit for Golf MK4 GTI / TT 180 / Leon 1.8T 20V
Car Styling For VW Golf MK4 1.8T Carbon Fiber Engine Cover - AliExpress