Upgrade Your Cooling System with a Reliable Coolant Reservoir Cap Keep your vehicle running smoothly with this Coolant Reservoir Cap (16405-0P040), a high-quality replacement part compatible with Toyota Sienna 2011-2020 and Lexus RX350/RX450h 2010-2015. Interchangeable with part number 16405-31070, this cap is engineered for a direct replacement fit, making installation quick and easy for DIY enthusiasts and everyday drivers alike. Specifications & Features: - Part Type: Coolant Reservoir Cap - Part Number: 16405-0P040 - Interchange Part Number: 16405-31070 - Fitment: Vehicle-specific design for Toyota Sienna (2011-2020) and Lexus RX350/RX450h (2010-2015) - Material: Durable construction to withstand extreme temperatures and pressure - Weight: Lightweight at approximately 2 ounces (varies slightly by batch) - Dimensions: Compact size fits standard coolant reservoir tanks (approx. 7 x 4 x 2 inches) Why Choose This Cap? This coolant overflow reservoir cap ensures a snug, leak-free seal to protect your engine from coolant loss and overheating—perfect for long road trips or daily commutes. It offers a reliable, cost-effective solution that outperforms worn-out factory caps. Whether you're searching for a coolant reservoir cap replacement or upgrading your Toyota coolant system, this cap delivers trusted performance every time. Key Benefits: - Prevents coolant leaks with a secure, vehicle-specific fit - Easy-to-install design saves time and repair costs - Built for durability, ideal for harsh weather or heavy use Order this Coolant Reservoir Cap today and experience peace of mind with a cooling system you can count on!