Description

The Audi Tube 4G0121081CS is a genuine OEM coolant vent tube / reservoir hose designed as part of the engine cooling system. It helps circulate coolant and release excess pressure or air from the system, ensuring stable engine temperature and preventing overheating.

This tube connects the coolant reservoir and engine components, maintaining proper coolant flow and system balance. It is precisely engineered for Audi’s high-performance engines, especially in A6, A7, S6, and S7 models.

 Specifications

• Product Type: Coolant Vent Tube / Reservoir Hose
• OEM Part Number: 4G0121081CS
• Other Names: Vent Pipe, Coolant Tube, Reservoir Hose
• Material: Heat-resistant plastic / reinforced composite
• Position: Rear / Upper section of cooling system
• Fitment Type: Direct OEM replacement
• Condition: New / Genuine OEM
• Application: Engine cooling & coolant circulation