The coolant reservoir is the plastic reservoir mounted in the engine bay that stores the coolant for the engine. Coolant reservoirs are required because engines go through cycles of expelling and absorbing coolant as they warm up and cool down.

Toyota Genuine Parts is the exact Original Equipment Manufacturer (OEM) part that your vehicle came with. When you select a genuine OEM part, you can rely on the high quality and effectiveness of the product and brand without having to guess if the product will work in sequence with your vehicle.

Protecting your investment is important and choosing the right parts can be challenging. So don't risk another minute by searching and buying something that might work. Stick with what you know and choose a Genuine OEM part.