Details

• Brand:

  

• SKU:

  21440-1PA0A

• Other Names:

  Radiator Drain Plug, Valve - Drain

• Description:

  Noticing coolant leaks near the bottom of your radiator or difficulty draining coolant during maintenance? Replace your worn or damaged drain plug with the OEM Nissan Radiator Drain Plug (Part #21440-1PA0A), designed for a perfect seal and long-lasting durability.

  Radiator Drain Plug (21440-1PA0A) – OEM Replacement Part for Nissan

  This genuine Nissan radiator drain plug allows controlled coolant drainage and resealing of the radiator without leaks. Built from durable, heat-resistant materials, it maintains a proper seal under pressure and prevents coolant loss over time. Ideal for routine maintenance, radiator flushes, or replacing a damaged or stripped plug.

  Specifications

  • Part Type: Radiator Drain Plug

  • Function: Seals and drains the radiator to control coolant flow during service

  • Construction: OEM-grade thermoplastic and rubber sealing washer for leak prevention

  • Position: Radiator lower tank (bottom drain area)

  • Includes: One genuine Nissan radiator drain plug assembly

  Compatible Nissan Models

  • 2011–2021 Nissan NV (F80US)

  • 2012–2021 Nissan NV3500 (WF80US)

  Fitment may vary by engine or cooling system type. To confirm compatibility for your specific vehicle, enter your VIN here

  and use the “Search by VIN #” option.

  Key Features

  • Genuine Nissan part ensures proper thread engagement and sealing

  • Heat- and chemical-resistant materials prevent cracking or warping

  • Designed to fit precisely with OEM radiator tanks

  • Prevents coolant leaks and air entry into the cooling system

  • Simple installation for leak-free maintenance

  Failing to Replace a Worn or Damaged Drain Plug Can Lead To:

  • Coolant Leaks: Resulting in low coolant levels and overheating

  • Cross-Threading or Stripped Threads: From over-tightening old or aftermarket plugs

  • Air Pockets in Cooling System: Causing erratic temperature readings

  • System Contamination: From loose debris or compromised seals

  Related Components to Inspect or Replace

  • Radiator Assembly: Inspect for cracks or corrosion around the drain area

  • Radiator Cap: Replace if seal is brittle or coolant is venting prematurely

  • Coolant Hoses: Check for bulges or soft spots

  • Engine Coolant (Nissan Blue or Green): Refill with approved coolant after service

  • Thermostat & Housing: Inspect for proper operation and sealing during cooling system service

  Order with Confidence

  Order the OEM Radiator Drain Plug (21440-1PA0A) to ensure a leak-free seal and reliable coolant retention during radiator service or replacement. Genuine Nissan components are engineered for precision fit and long-term dependability.

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  Why Buy OEM Nissan Parts from Chapman Nissan?

  Every OEM part listed on our site is genuine from Nissan, built to exact factory specs for fit, function, and reliability. Unlike aftermarket plugs, genuine Nissan drain plugs maintain the proper thread depth, material tolerance, and heat resistance for lasting performance.

  • Fast, secure shipping from a certified Nissan dealer

  • VIN check available to ensure compatibility

  • Trusted by Nissan owners and professional technicians

  Cooling System FAQ

  Q: Does this include a new sealing washer or gasket?
  A: Yes, the plug includes an integrated rubber sealing washer to prevent leaks.

  Q: How tight should the drain plug be installed?
  A: Tighten by hand until snug — do not overtighten, as this can damage the radiator threads.

  Q: What coolant should I use after replacement?
  A: Use only Nissan-approved coolant (Blue or Green) depending on your vehicle’s specifications.

  Q: Can I reuse the drain plug during each coolant flush?
  A: It can be reused if the seal is intact, but replacement is recommended if any cracking or deformation is visible.

• Condition: New
• Notes: Included with radiator.

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