Replace Toyota Sienna Engine Cooling Fan Assembly & Toyota Sienna Radiator Fans In Canada. Browse Toyota Sienna Radiator Fans. Proper maintenance of the radiator fan in your Toyota Sienna is crucial for engine cooling efficiency and to prevent overheating. Regularly check for debris and ensure blades are clean for optimal airflow; listen for unusual noises or observe excess vibration that may signal the need for replacement. When selecting a new fan, consider the OEM-style for assured compatibility or performance aftermarket options for enhanced cooling. High-quality materials like reinforced plastic or metal offer durability, while installation ease can be ensured with complete assemblies that match factory specifications. With these steps, you can extend the life of your Sienna's radiator fan, ensuring your engine runs cool and your journeys remain uninterrupted.