Engine Coolant Expansion Reservoir for Nissan NV350 Series

Keep your van’s temperature in the safe zone with this OE-style coolant overflow bottle. Built from heat‑resistant, translucent plastic, it lets you monitor levels at a glance and stabilizes the cooling system under daily load, city traffic, or long hauls. Perfect direct-fit solution for NV350 platforms. ❄️

Why this part is needed

Engines push coolant hard. As temperature rises, fluid expands; as it cools, fluid contracts. The reservoir stores the extra coolant and feeds it back so your radiator stays full, pressure stays balanced, and air stays out. Result: consistent cooling, longer water pump life, and safer operating temps.

How it works

During heating, excess coolant flows from the radiator neck through a small hose into the bottle. When the engine cools, vacuum draws coolant back through the same line. The cap and vent manage pressure, while MIN/MAX marks guide top‑ups. Simple, sealed, reliable. ⚙️

What happens if it’s broken

Cracks, loose cap, or brittle nipples cause leaks and air pockets. Expect overheating, weak cabin heat, brown residue near the tank, collapsing hoses, and possible head gasket stress. Replace at first signs of clouding, warping, or seepage to prevent costly engine damage. ⚠️

Compatibility

• Nv350 Urvan
• Nv350 Caravan