Engine Coolant Thermostat Kit

Part Number: 21200-4W01B
Supersession(s): 21200-4W010; 212004W01B


  • Helps engine maintain normal operating temperature

  • Controls flow of coolant from radiator to engine

  • Replace quickly when malfunctioning

Your vehicle depends on coolant to help the engine stay cool and at the correct operating temperature. Many parts help coolant complete its job, and the coolant thermostat is one of the most important ones. When the thermostat stops working properly, you need to replace it immediately. This INFINITI Engine Coolant Thermostat Kit has what you need to successfully replace the thermostat.

You can usually find the coolant thermostat between the radiator and engine. It serves as a gate and stops or allows the flow of coolant between the two parts. Thermostats have a preset temperature that regulates when they open. As things warm up, the coolant thermostat opens, allowing the coolant to flow through your engine. When your engine gets to its proper operating temperature, the coolant returns to the radiator, where it cools down before once again making its way to the engine. It’s essential that your coolant thermostat opens and closes at the right times to help keep your engine at the optimal temperature.

Your coolant thermostat is an integral part of the cooling system in your INFINITI, and you're likely to notice when it starts failing. When a thermostat malfunctions, it generally means it's stuck open or closed. Symptoms of a bad coolant thermostat include an overheating engine, erratic temperature changes, and coolant leaks. If you experience any of these symptoms, take your INFINITI in to get checked out immediately.

A poorly working coolant thermostat can cause long-term damage to your INFINITI’s engine, so it's crucial you replace it ASAP. With an Engine Coolant Thermostat Kit made to fit your INFINITI and the right tools, replacing the thermostat on your own can be relatively easy. Don't forget your engine cools all the way before beginning the task. If you aren’t comfortable removing the thermostat and installing your replacement Engine Coolant Thermostat Kit, you can leave it to trained technicians and bring your vehicle to an INFINITI service center.

Your coolant thermostat is necessary for your cooling system to work. When it's time to replace it, you need to order a Engine Coolant Thermostat Kit that fits. Shop Genuine INFINITI Parts to find a quality Engine Coolant Thermostat Kit custom-made for your model and year.

he Engine Coolant Thermostat Kit, part 212004W01B, is compatible with INFINITI FX35 2003-2008, INFINITI G35 2003-2007, or INFINITI QX4 2001-2003. View the What This Fits tab for more information.



THERMOSTAT ASSY

Fits FX35, G35

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Diagram WATER PUMP, COOLING FAN & THERMOSTAT for your 2004 INFINITI G35 3.5L V6 MT 2WD SEDAN TRACK(LEATHER)
#21200
Required: 1
CUPE. VQ35DE<200208 - 200306>
CUPE. VQ35DE<200306 - 200310>
CUPE. VQ35DE<200310 - 200408>
CUPE. VQ35DE<200408 - 200508>
CUPE. VQ35DE<200508 - 200608>
CUPE. VQ35DE<200608 ->
SEDAN. VQ35DE<200208 - 200306>
SEDAN. VQ35DE<200306 - 200310>
SEDAN. VQ35DE<200310 - 200408>
VQ35DE<200201 - 200208>
2007 - 2007
- VQ35DE

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