Details

• Brand:

  

• SKU:

  21230-3NT0B

• Other Names:

  coolant hose, coolant outlet hose, heater hose assembly, water control valve hose, cooling system hose, radiator outlet hose

• Description:

  Engine Cooling Hose – Coolant Outlet Hose with Water Control Valve (21230-3NT0B)

  OEM Replacement Part for Nissan

  Experiencing coolant leaks, engine overheating, fluctuating temperature readings, or weak cabin heat? A failing coolant outlet hose or water control valve can restrict coolant circulation and disrupt proper engine temperature regulation. The Genuine Nissan Engine Cooling Hose with Water Control Valve (21230-3NT0B) helps restore proper coolant flow between the engine, radiator, and heater core for stable operating temperatures and reliable heater performance.

  The OEM Nissan Coolant Outlet Hose with Water Control Valve (21230-3NT0B) is engineered specifically for Nissan cooling systems and helps maintain proper coolant routing, pressure regulation, and thermal balance for long-term engine reliability.

  Always verify compatibility by VIN before ordering. Enter your VIN above and every order is reviewed by a certified Nissan parts specialist before shipping.

  Specifications

  Part Type: Engine Cooling Hose with Water Control Valve
  System: Engine Cooling System
  Function: Directs and regulates coolant flow between the engine, radiator, and heater core
  Construction: Reinforced heat-resistant coolant hose with integrated OEM-calibrated water control valve
  Location: Coolant outlet circuit / Engine-to-radiator routing
  Included: One (1) coolant hose assembly with attached water control valve
  OEM Type: Genuine Nissan OEM Replacement Part
  VIN Required: Yes

  Compatible Nissan Models

  This genuine Nissan coolant outlet hose with water control valve fits select Nissan vehicles including:

  2016–2022 Nissan Altima | 2.5L I4

  2016–2022 Nissan Rogue | 2.5L I4

  2016–2022 Nissan Murano | 3.5L V6

  2016–2021 Nissan Maxima | 3.5L V6

  Fitment may vary depending on trim level, production date, or engine configuration.

  Check compatibility here by entering your VIN:
  https://parts.chapmannissan.com

  Key Features

  • Integrated OEM Water Control Valve
  Regulates coolant flow for stable engine operating temperatures.

  • Supports Consistent Cabin Heater Performance
  Maintains proper coolant circulation through the heater core.

  • Heat-Resistant Reinforced Hose Construction
  Designed to withstand cooling system pressure and high temperatures.

  • OEM Nissan Cooling System Calibration
  Engineered specifically for Nissan thermal management systems.

  • Helps Prevent Coolant Flow Restrictions
  Supports proper coolant circulation throughout the cooling system.

  Failing to Replace a Faulty Coolant Hose or Water Control Valve Can Lead To

  Engine Overheating
  Restricted coolant flow or coolant loss may cause severe engine damage.

  Coolant Leaks
  Cracked hose material or valve housing may allow coolant seepage or loss.

  Poor Heater Performance
  Weak or inconsistent cabin heat may occur from improper coolant circulation.

  Erratic Temperature Readings
  A sticking valve may disrupt coolant temperature regulation.

  Accelerated Engine Wear
  Repeated overheating may shorten engine component life.

  Related Components to Inspect or Replace

  Thermostat & Thermostat Housing
  Helps regulate engine warm-up and operating temperature.

  Radiator & Coolant Reservoir
  Inspect for leaks, cracks, or coolant level issues.

  Water Pump
  Ensures proper coolant circulation throughout the engine.

  Heater Core Hoses
  Inspect for cracking, swelling, or coolant seepage.

  Coolant Temperature Sensor
  Monitors cooling system temperature for ECM operation.

  Order with Confidence

  Restore proper cooling system operation and cabin heating performance with the Genuine Nissan Engine Cooling Hose with Water Control Valve (21230-3NT0B) engineered specifically for Nissan cooling systems.

  Always verify compatibility by VIN before ordering. Enter your VIN above and every order is reviewed by a certified Nissan parts specialist before shipping.

  All OEM Nissan parts are shipped directly from Chapman Nissan in Philadelphia, PA, and every order is reviewed by a certified Nissan parts specialist before shipping.

  Most OEM Nissan parts ship within 1–3 business days from certified Nissan warehouses.

  Need assistance confirming compatibility?

  https://parts.chapmannissan.com/contact-us
  Phone: 215-492-1200

  Restore Your Nissan with Genuine Accessories

  Keep your Nissan protected and performing properly with genuine Nissan maintenance parts and accessories including coolant components, floor liners, cargo protection, splash guards, and OEM service parts engineered specifically for your vehicle.

  Why Buy OEM Nissan Parts from Chapman Nissan?

  Every OEM Nissan cooling system component we sell is engineered to factory specifications for coolant flow, pressure regulation, and long-term durability. Unlike many aftermarket hose assemblies, genuine Nissan coolant hoses and water control valves are designed specifically for proper fitment, thermal performance, and cooling system reliability.

  Fast, secure shipping
  VIN-verified fitment assistance
  Trusted by Nissan owners and professional technicians nationwide

  FAQ

  What does the water control valve do?
  The water control valve regulates coolant flow through the cooling system and heater core to maintain stable operating temperatures.

  Can this hose assembly cause overheating?
  Yes. Restricted coolant flow, valve failure, or coolant leaks may lead to overheating conditions.

  What are common symptoms of a failing coolant outlet hose or valve?
  Common symptoms include coolant leaks, overheating, fluctuating temperature readings, or weak cabin heat.

  Should the thermostat be replaced at the same time?
  Thermostat inspection or replacement is commonly recommended during cooling system repairs, especially on higher-mileage vehicles.

  Does this assembly include clamps or hardware?
  No. Clamps and related hardware are typically sold separately if needed.

• Condition: New

• Warranty:

  This Genuine Nissan part is backed by Nissan’s nationwide 12-month / 12,000-mile warranty, covering defects in materials or workmanship. Labor coverage applies only when installed at an authorized Nissan dealer. Wear-related conditions are not covered unless caused by a manufacturing defect.

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