- Part of your engine's cooling system
- Stores and regulates excess coolant
- Replace when cracked or leaking
The Engine Coolant Reservoir is a crucial piece of your Nissan's cooling system. Coolant absorbs the heat produced during combustion to help keep your engine cool. Coolant works on a cycle, which is why your engine has an Engine Coolant Reservoir. As your engine gets hot, the coolant expands, and excess fluid flows into your Engine Coolant Reservoir. As your engine cools down, this coolant is pulled back into the radiator. The Engine Coolant Reservoir is also where new coolant is added before it makes its way to the radiator.
The Engine Coolant Reservoir is usually made of plastic, which makes it prone to cracking over time. There are a few signs of an Engine Coolant Reservoir problem to be aware of. If you're constantly needing to add new coolant, there could be a crack or small leak. You may notice puddles of greasy green, yellow, or pink liquid underneath the front of your vehicle. This is a sign of a coolant leak. When not caught quickly enough, a failing Engine Coolant Reservoir could also lead to your engine overheating.
Your owner's manual contains information about where your Nissan Engine Coolant Reservoir can be found and how to check the coolant level. Coolant gets very hot and can be a burn risk. Remember to let your radiator and engine cool down all the way before unscrewing the reservoir cap. If your Engine Coolant Reservoir is leaking or cracked, you should replace it immediately to help avoid engine damage. Coolant can be dangerous to work with, so it's recommended you leave the installation to professionals.
Your Nissan Engine Coolant Reservoir is a simple but important part of your cooling system. When it's time for a new one, you need a reservoir designed for your specific vehicle. Purchase genuine OEM parts to find the right fit.
This Engine Coolant Reservoir, part 217100W001, fits Nissan Pathfinder 1996-1999. See the What This Fits tab for more fitment details.
TANK ASSY-RADIATOR RESERVOIR
Fits Pathfinder (1996 - 2010)