Shop Best Volkswagen Overflow Tanks. Replace Volkswagen Antifreeze Reservoir Tank & Volkswagen Coolant Reservoirs Replacement Cost. Maintaining the coolant tank in your Volkswagen is crucial for engine health, as it prevents overheating and ensures optimal performance. Regular checks for leaks, cracks, or discoloration will signal when a replacement is needed. To extend its lifespan, use only the manufacturer-recommended coolant, and ensure the system is flushed according to Volkswagen's service schedule. When selecting a replacement, opt for either the durable OEM tanks for a guaranteed fit or high-quality aftermarket options with enhanced features like improved heat resistance. Installation is straightforward, but always ensure all connections are secure and free from debris to avoid future issues. Shop with us for a seamless experience and a range of options to suit your Volkswagen's needs.