Toyota Tundra and Sequoia owners, listen up! Is your coolant reservoir cap looking old, cracked, or not sealing right? A bad cap can cause coolant to leak or evaporate, mess with your engine's pressure, and lead to overheating. This is a direct replacement cap designed to fit perfectly. It matches the OEM part number 16405-0P100. So, if you have a Tundra from 2007 all the way through 2021, or a Sequoia from 2008 through 2022, this should be the exact cap you need. Its main job is to create a tight, leak-proof seal on your coolant overflow tank. This keeps the coolant in and keeps dirt and moisture out. It also maintains the proper pressure in your cooling system, which is super important for preventing boils and keeping your engine at the right temperature. It's made from high-quality, corrosion-resistant materials so it won't degrade easily. Best part? Installation is a 30-second job – no tools needed, you just twist the old one off and screw this new one on by hand. A simple, affordable part that plays a big role in your engine's health and safety.
