Genuine OEM Audi Engine Additional Coolant Cooler, part number 4S0121252B. This auxiliary cooler is designed to provide additional heat dissipation for the engine coolant, especially in high-performance or demanding driving conditions. It is typically located on the left side of the engine bay, complementing the main radiator. Measuring approximately 0.5m x 0.34m x 0.1m and weighing 3.174 kg, it features a robust finned core construction. Using a genuine OEM additional coolant cooler ensures optimal thermal exchange efficiency and proper integration with the existing cooling system, preventing engine overheating and maintaining performance.

Catalogue entry: RADIATOR left.

Fitted with: N10664901 SCREW, 420121275A RUBB. BUSH.