Details

• Brand:

  

• SKU:

  21200-4W01B

• Other Names:

  Thermostat, Thermostat Housing, Thermostat Outlet, Thermostat Assembly

• Description:

  Experiencing coolant leaks or fluctuating engine temperatures? Restore proper cooling system function with the OEM Nissan Thermostat Housing (Part #21200-4W01B), engineered for a precise fit and long-term durability.

  Thermostat Housing (21200-4W01B) – OEM Replacement Part for Nissan

  This genuine Nissan thermostat housing regulates coolant flow between the engine and radiator to maintain optimal operating temperature. Built from durable cast aluminum and sealed to factory standards, it prevents leaks and ensures efficient engine warm-up and cooling performance.

  Specifications

  • Part Type: Thermostat Housing

  • Function: Holds and seals the thermostat, directing coolant between the engine and radiator

  • Construction: OEM-grade cast aluminum housing with machined sealing surfaces

  • Position: Front of engine block (location varies by model)

  • Includes: Thermostat housing assembly (thermostat sold separately)

  Compatible Nissan Models

  • 2002–2008 Nissan 350Z (Z33US)

  • 1995–2004 Nissan Pathfinder (R50US)

  Fitment may vary by engine or production date. To confirm compatibility for your specific vehicle, enter your VIN here

  and use the “Search by VIN #” option.

  Key Features

  • OEM Nissan housing ensures factory sealing and cooling efficiency

  • Precisely machined mating surfaces prevent coolant leaks

  • Built to resist corrosion and high-temperature wear

  • Direct-fit design — no modification required

  • Compatible with Nissan factory thermostats and gaskets

  Failing to Replace a Damaged Thermostat Housing Can Lead To:

  • Coolant Leaks: Loss of coolant can cause overheating or low temperature readings

  • Erratic Temperature Fluctuations: Poor sealing may cause inaccurate thermostat function

  • Overheating or Engine Damage: Insufficient coolant flow leads to severe engine wear

  • Corrosion and Rust Build-Up: Aged housings may corrode and damage mounting surfaces

  Related Components to Inspect or Replace

  • Thermostat: Replace during housing service to ensure proper temperature regulation

  • Housing Gasket or O-Ring: Always install new seals to prevent leaks

  • Radiator Hoses: Check for cracks or soft spots

  • Coolant Temperature Sensor: Inspect for corrosion or inaccurate readings

  • Coolant: Refill with Nissan-approved coolant after installation

  Order with Confidence

  Order the OEM Thermostat Housing (21200-4W01B) to restore your Nissan’s cooling performance and protect your engine from overheating. Genuine Nissan components are designed to maintain proper coolant flow and ensure reliable long-term performance.

  Restore Your Nissan with Genuine Accessories!

  Looking to restore your Nissan? We offer factory-direct Nissan accessories at competitive prices, including all-weather floor mats, pet accessories, roof carriers, and wheel locks. Whether you’re restoring protection, style, or utility, shop genuine Nissan parts and accessories all in one place!

  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 safety. Unlike aftermarket housings, genuine Nissan components are precisely machined to maintain proper coolant pressure and sealing integrity.

  • 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 housing include the thermostat?
  A: No, the thermostat is sold separately. We recommend replacing both together for best performance.

  Q: What causes thermostat housing leaks?
  A: Common causes include corrosion, overtightened bolts, or gasket failure.

  Q: Can I reuse the old gasket?
  A: No. Always use a new gasket or O-ring to ensure a proper seal.

  Q: How do I know if my housing is failing?
  A: Look for coolant leaks around the housing, engine overheating, or fluctuating temperature readings.

  350Z. Pathfinder. 3.5L, auto trans. Convertible, to 11/06.

• Condition: New
• Replaces:

  212004w010

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