Browse Audi A4 Engine Cooling Assemblies Replacement. Shop Audi A4 Engine Cooling Fan Assembly & Audi A4 Cooling System Pressure Tester. Maintaining the cooling system in your Audi A4 is crucial for optimal performance and longevity. Regularly check coolant levels and inspect for leaks; discoloration or a drop in level often signals a need for replacement. Enhance the system's lifespan by flushing the coolant every 30,000 miles and using a high-quality antifreeze. When selecting a new cooling system, consider options like traditional, hybrid, and electric variants, each designed to offer efficiency and tailored cooling capacity. Ensure you opt for systems crafted with durable materials, and during installation, always adhere to the manufacturer's guidelines to guarantee a seamless fit and function. Keep your A4 running smoothly with a cooling system that meets your performance standards and driving conditions.