Details

• Brand:

  

• SKU:

  21501-3JA0A

• Positions: Upper
• Other Names:

  Radiator Coolant Hose, Hose-Top

• Description:

  Noticing coolant leaks or engine temperatures running high? Restore proper coolant flow and protect your Pathfinder’s engine from overheating with the OEM Nissan Upper Radiator Hose (Part #21501-3JA0A), engineered for a precise factory fit and lasting durability.

  Upper Radiator Hose (21501-3JA0A) – OEM Replacement Part for Nissan

  This genuine Nissan upper radiator hose transfers coolant between the engine and the radiator to regulate temperature and prevent overheating. Built from high-strength, heat- and pressure-resistant rubber, this hose provides a leak-free seal and maintains proper coolant circulation for reliable engine performance.

  Specifications

  • Part Type: Upper Radiator Hose

  • Function: Carries coolant from the engine to the radiator

  • Construction: OEM-grade reinforced rubber with factory-formed bends

  • Position: Upper (engine outlet to radiator inlet)

  • Includes: One (1) upper radiator hose assembly

  Compatible Nissan Models

  • 2012 – 2021 Nissan Pathfinder (R52US)

  Fitment may vary by engine and trim. To confirm compatibility for your specific vehicle, click here

  and enter your VIN using the “Search by VIN #” feature before ordering.

  Key Features

  • Genuine Nissan OEM part ensures proper fit and coolant routing

  • Maintains consistent engine operating temperature

  • Resists cracking, swelling, and heat degradation

  • Formed bends match factory design — no trimming or adjustments needed

  • Direct-fit replacement for simple, secure installation

  Important Installation Note

  When replacing the upper radiator hose:

  • Flush and refill the cooling system with fresh Nissan-approved coolant.

  • Inspect the lower radiator hose and heater hoses for wear or soft spots.

  • Replace hose clamps if corroded or weakened.

  • Bleed the cooling system to remove trapped air and prevent overheating.

  Proper coolant mixture and air bleeding are essential to maintain system pressure and cooling efficiency.

  Failing to Replace a Worn Hose Can Lead To:

  • Coolant Leaks: From cracked rubber or deteriorated fittings

  • Engine Overheating: From coolant loss or flow restriction

  • Reduced Cabin Heat: Poor coolant circulation through the heater core

  • Unexpected Breakdowns: Hose failure under pressure or heat stress

  • Potential Engine Damage: Due to low coolant levels or air pockets

  Related Components to Inspect or Replace

  • Lower Radiator Hose (21503-9NB0A): Replace together for balanced cooling system performance

  • Thermostat & Housing: Ensure accurate temperature control

  • Radiator Cap: Maintains correct system pressure

  • Coolant Reservoir Hose: Check for cracks or brittleness

  • Nissan Genuine Coolant (Blue): Use only Nissan-approved coolant to protect aluminum components

  Order with Confidence

  Order the OEM Nissan Upper Radiator Hose (21501-3JA0A) to maintain your Pathfinder’s factory cooling performance and reliability. Genuine Nissan hoses ensure the correct fit, routing, and long-term resistance to heat and pressure.

  Restore Your Nissan with Genuine Accessories!

  Keep your Nissan performing and looking its best with genuine factory parts and accessories. From filters and belts to all-weather mats and roof racks, shop authentic Nissan components in one place at parts.chapmannissan.com

  .

  Why Buy OEM Nissan Parts from Chapman Nissan?

  Every part we sell is genuine from Nissan, engineered to the same standards used on the assembly line. Unlike aftermarket hoses, OEM components feature the correct inner diameter, bend radius, and material composition to maintain coolant flow and prevent leaks.

  • Fast, secure shipping from a certified Nissan dealer

  • VIN verification available for guaranteed fit

  • Trusted by Nissan owners and professional technicians

  Cooling System FAQ

  Q: Does this hose include clamps?
  A: Yes the clamps are included with this hose

  Q: Should I replace the lower hose at the same time?
  A: Yes. Replacing both radiator hoses together ensures consistent system pressure and reliability.

  Q: What type of coolant should I use?
  A: Use only Nissan-approved coolant (typically blue) for corrosion protection and compatibility.

  Q: Do I need to bleed the cooling system after replacement?
  A: Yes. Bleeding removes trapped air that could cause overheating or temperature fluctuation.

• Condition: New
• Applications: 3.5L.

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