What this usually means
Water pump and thermostat housing leaks are common on many VW TSI engines. Pressure-test the cooling system and inspect the pump housing before approving radiator or head-gasket work.
What to ask the workshop before approving repair
- • Show the diagnostic fault codes.
- • Show photo/video proof of the failed part.
- • Give an itemised quote for parts and labour.
- • Explain why cheaper common fixes were ruled out.
- • Use/confirm: Cooling system pressure tester
This is not a final diagnosis. It is a money-saving checklist before you go workshop.