NISSAN 21200-VC20A Thermostat Assembly

The Nissan 21200-VC20A genuine (OEM) thermostat assembly is a vital component of the vehicle's cooling system. Its role is the precise regulation of coolant flow between the engine block and the radiator, ensuring the engine reaches its optimal operating temperature as quickly as possible and maintains it consistently.

Technical Specifications and Construction

Manufactured to strict automotive standards, this premium genuine Nissan part ensures a perfect fit and long service life. Its operation relies on thermal expansion, providing exceptionally accurate and reliable response times to temperature variations.

• Type: Genuine (OEM) thermostat assembly
• Material: Highly corrosion-resistant brass and stainless steel construction
• Operating Principle: Wax pellet thermal expansion regulation
• Benefits: Fast engine warm-up, optimal combustion efficiency, reduced emissions

Common Symptoms of Thermostat Failure

Over time or due to contaminated coolant, the thermostat may fail. Typical symptoms include:

• Stuck Open: The engine takes too long or fails to reach operating temperature, cabin heater performance is poor, and fuel consumption increases.
• Stuck Closed: Coolant cannot circulate to the radiator, leading to rapid engine overheating and potential severe cylinder head damage.
• Fluctuating Temperature: The dashboard temperature gauge fluctuates erratically while driving.

To protect the engine, it is recommended to flush the cooling system and refill it with fresh coolant complying with OEM specifications whenever replacing the thermostat.