Genuine 4G0 121 081 CN Coolant Overflow Hose

The Genuine 4G0 121 081 CN is an OEM-quality coolant overflow hose designed to maintain the integrity of your vehicle's cooling system. This hose connects the coolant reservoir (overflow/expansion tank) to the cooling system, allowing coolant to flow back and forth as the engine heats up and cools down — preventing pressure buildup and protecting against coolant loss.

Manufactured to original equipment specifications, this hose ensures a precise fit and reliable performance. Using a genuine OEM part guarantees compatibility with the original mounting points, fittings, and clamps without modification.

Key Features:

• OEM part number: 4G0 121 081 CN
• Direct factory replacement — no modifications required
• Constructed from heat- and pressure-resistant rubber/silicone compound
• Maintains proper coolant circulation between reservoir and cooling system
• Helps prevent overheating and coolant loss
• Exact-fit replacement for original equipment hose

Replacing a cracked, brittle, or leaking coolant overflow hose is an important maintenance step to prevent engine overheating. This genuine OEM hose is the recommended replacement to restore your cooling system to factory specification.