Buy OEM Audi Part # 4H0121331 (4H0-121-331). Radiator Air Seal. 4.0 LITER. 6.3 LITER. DIESEL. GAS. Radiator - Repair or Replace Typical symptoms for a failed radiator include both

Radiator Air Seal. Seal strip.
Seal used on the Radiator.

Radiator Air Seal

Fits A8, S7 Sportback, S8

4.0 LITER. 6.3 LITER. DIESEL. GAS.
Radiator - Repair or Replace
Typical symptoms for a failed radiator include both an overheating engine and a coolant leak. But some radiator failures can also result in burned or dark transmission fluid. If the cooling system in your Audi needs attention, contact a factory-trained Audi technician.