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Target · Diagram
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Number 1 marks the part’s position in the exploded view.
03C121111H Audi Coolant Regulator Housing
It houses the thermostat to regulate engine coolant flow.
• Genuine OEM part • Condition: New • Part number: 03C121111H • Part type: Coolant Regulator Housing
Verify fitment by VIN or matching the part number before ordering.
03C121111H Audi Coolant Regulator Housing fits: Volkswagen Passat/Variant/Santana 1974–present.
This list may not include every compatible vehicle. If you’re unsure, share your VIN and our fitment team will confirm the right part before you order.
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