Improving vehicle safety: The coolant overflow reservoir cap can maintain the normal operation of the vehicle's cooling system, avoiding engine overheating caused by coolant leakage. Accurate compatibility: The coolant overflow reservoir cap is suitable for Toyota Highlander 2014-2019, Lexus RX350 2016-2022, and Lexus RX450h 2016-2022. Replace 16405-0P140 with 16405-31100. High quality rubber material: The storage tank cover is made of high-grade plastic and rubber materials, which have excellent high temperature resistance and corrosion resistance. This durable material can withstand high pressure and extreme temperatures, ensuring long-term sealing and reliability, and is not easily damaged or deformed. Easy to install: The installation process of the coolant overflow storage tank is simple and fast. Simply remove the old cover and install the new cover within a few seconds to ensure a simple and worry free replacement process. KUOWPZI Coolant Reservoir Cap 16405-31070 / 16405-0P040 Fit for Toyota Sienna 2011-2020, 2010-2015 Lexus RX350, RX450h