Coolant Expansion Tank Hose for A6 S6 | Replaces 4K0121081CQ 4K0121081BT

Leaking coolant or experiencing coolant system pressure issues?

This OEM-style coolant expansion tank hose is designed to maintain proper coolant circulation between the coolant reservoir and engine cooling system.

Manufactured from durable heat-resistant rubber and reinforced materials, this hose helps withstand high engine temperatures and cooling system pressure under daily driving conditions.

Perfect for replacing cracked, leaking, swollen, or aging factory coolant hoses.

✔ OEM-style aftermarket replacement
✔ Helps maintain stable coolant circulation
✔ Durable heat-resistant construction
✔ Designed for reliable cooling system performance
✔ Direct-fit installation
✔ No modification required

Compatible with selected models:

• A6
• S6

Reference OE Part Numbers:

• 4K0121081CQ
• 4K0121081BT

Package Includes:

• 1 × Coolant Expansion Tank Hose