• Important part of cooling system
• The hose coolant travels through to get between the radiator and engine
• Replace when cracked or leaking

Your Nissan's cooling system is designed to keep the vehicle from overheating. And the cooling system depends on a functioning, quality Radiator Coolant Hose (Upper) to work like it should. As your vehicle's coolant fluid passes through the radiator and coolant system to you vehicle's engine, it passes through a Radiator Coolant Hose (Upper). It's important your Radiator Coolant Hose (Upper) is free from cracks, bloating, or leaks that may cause further damage to your vehicle.

In time, the rubber that makes the Radiator Coolant Hose (Upper) on your Nissan can get worn out. If this happens, the Radiator Coolant Hose (Upper) can become brittle and crack, allowing coolant to leak out. If an excess amount of coolant leaks out, the engine may not get enough coolant to control the engine's temperature, which could cause your Nissan to overheat. An overheated engine could lead to repairs and damage your vehicle.

In addition, your Radiator Coolant Hose (Upper) can become bloated, meaning the hose bulges out or swells in some places. An engine overheating from low coolant may cause extremely hot coolant to travel through the Radiator Coolant Hose (Upper), which can make the rubber swell and bloat, likely causing additional damage and cracks to the Radiator Coolant Hose (Upper).

If you believe a Radiator Coolant Hose (Upper) on your Nissan needs to be replaced, a great place to start is a visual inspection. When working with the coolant system, always make sure the engine and coolant system are completely cooled down, as the entire cooling system is pressurized, and heated coolant can spray if the Radiator Coolant Hose (Upper) becomes compromised.

When inspecting your Radiator Coolant Hose (Upper), look for dry-rot, cracks, swelling, or warping. Look for coolant leaks on the ground underneath the vehicle, specifically underneath where the Radiator Coolant Hose (Upper) is located on the vehicle.

Also, check the dashboard if you feel you have a bad Radiator Coolant Hose (Upper). Check to see if the Low Coolant light is on or if the temperature gauge is displaying that your engine is running hot. Your owner's manual provides an overview of the different dashboard lights and their meanings.

Is your Nissan in need of a new Radiator Coolant Hose (Upper)? Order a genuine replacement Cooling System Radiator Coolant Hose (Upper) for your Nissan Frontier or Nissan Xterra. See the What This Fits tab for more details.

Fits Frontier (1998 - 2004)