MK6 Volkswagen Golf R gateway module fault - NON START

This Mk6 Golf R arrived at Kolatech after another garage declared it “unfixable”. Electrical faults everywhere. Modules dropping offline. Communication errors across the CAN network. The sort of issue that can quickly spiral into expensive guesswork. The real cause? Blocked scuttle drains. Leaves and debris had allowed water to build up behind the dash, soaking the CAN gateway module and causing chaos across the car’s electrical system — ultimately leading to a repair bill pushing £1000. In this episode we track the fault properly, explain how something so simple caused so much damage, and get this Mk6 Golf R back on the road. Check your drains. ⚙️ Performance alignment & diagnostics 📍 Kolatech — UK performance workshop 📸 @kolatech_