Details

• Brand:

  

• SKU:

  21200-1LA1A

• Other Names:

  Engine Thermostat, Coolant Temperature Regulator, Cooling System Valve

• Description:

  Engine Coolant Thermostat (21200-1LA1A) – OEM Replacement Part for Nissan

  Genuine Nissan Engine Coolant Thermostat

  If your Nissan is running hotter or colder than normal, taking too long to warm up, or showing fluctuations in temperature, the Genuine Nissan Thermostat (21200-1LA1A) restores proper temperature regulation in your cooling system. This OEM thermostat is engineered to open and close at the correct temperature range to protect your engine from overheating, improve fuel efficiency, and maintain stable operating performance.

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

  Specifications

  Part Type: Engine Coolant Thermostat
  Category: Genuine Nissan OEM
  Material: High-temperature alloy with calibrated thermal spring
  Function: Regulates coolant flow to maintain correct engine operating temperature
  Includes: Thermostat only (housing sold separately on some models)

  Compatible Nissan Models

  This Genuine Nissan thermostat fits:

  Nissan Armada

  • 2003–2015 Armada (TA60US)
  • 2016–2018 Armada (early cooling design overlap)

  Nissan NV / NV3500

  • 2011–2021 NV (F80US)
  • 2012–2021 NV3500 (WF80US)

  Fitment varies by engine configuration and production date.
  Check compatibility here by entering your VIN: https://parts.chapmannissan.com

  Key Features

  • Genuine Nissan thermostat ensures correct temperature control
  • Precision-calibrated opening point for safe engine operation
  • Helps restore proper heater performance and fuel efficiency
  • Durable design for long-term thermal stability
  • Engineered specifically for Nissan V8 truck/SUV platforms

  Failing to Replace a Faulty Thermostat Can Lead To

  Overheating: Can cause head gasket damage or warped components
  Poor heater performance: Cabin heat may be weak or inconsistent
  Long warm-up time: Can reduce fuel economy and engine efficiency
  Erratic temperature readings: Engine may cycle between hot and cold
  Coolant loss or pressure issues: Sticking thermostats can strain hoses and seals

  Related Components to Inspect or Replace

  Thermostat Housing – Some applications require a separate housing
  Radiator Cap – Ensures proper system pressure
  Radiator Hoses (Upper/Lower) – Replace if swollen or brittle
  Water Pump – Verify coolant flow and bearing condition
  Engine Coolant – Replace old or contaminated coolant when servicing

  Order with Confidence

  Choose the Genuine Nissan Engine Coolant Thermostat (21200-1LA1A) to restore precise temperature control and protect your engine from overheating or underheating. Visit parts.chapmannissan.com for availability and ordering.

  Restore Your Nissan with Genuine Accessories

  Shop Nissan-engineered accessories including floor mats, cargo organizers, bed accessories, and towing upgrades — all available through Chapman Nissan.

  Why Buy OEM Nissan Parts from Chapman Nissan?

  Genuine Nissan cooling components are engineered to the exact thermal specifications your engine requires. Aftermarket thermostats may not open at the correct temperature, leading to overheating, poor heater output, or long-term engine damage.

  Fast, secure shipping from a certified Nissan dealer
  VIN verification available for accurate fitment
  Trusted nationwide by Nissan truck and SUV owners

  Cooling System FAQ

  Q: Will this thermostat fix my fluctuating temperature gauge?
  A: In many cases, yes — a sticking thermostat can cause erratic readings.

  Q: Does this thermostat come with a gasket?
  A: Some models require a separate gasket or O-ring; VIN verification is recommended.

  Q: Should I flush the coolant when replacing the thermostat?
  A: Yes, this is often recommended for system health and longevity.

  Q: Can a thermostat stuck open cause problems?
  A: Yes — it can cause low heater output, poor fuel economy, and cold-running misfires.

  TITAN. Armada. 2012-16. Nv full size Van. Pathfinder. 5.6l.

• Condition: New
• Applications: 5.6L 2012-2016.
• Replaces:

  212001la0a, 21200ad200, 21200ad201

• Warranty:

  This part is covered by a 12-month / 12,000-mile limited warranty against defects in materials or workmanship. Labor coverage applies only when installed at an authorized Nissan dealer.

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