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.
Volkswagen Golf IV 1.8T GTI (2000) in vendita a 5.100 EUR
Motore Cambio Volkswagen golf mk 2 1988 1.8 cc 90 cv funzionante con 112.000 km | eBay
Volkswagen Golf III 1.8 engine start and sound HD - YouTube