How to testing, remove, and replace a thermostat in a Nissan Frontier's cooling system?

To properly test a thermostat, suspend the (closed) thermostat on a string in a container of cold water, with a thermometer and heat the water on a stove. Write down the temperature when the thermostat begins to open and when it is fully open. If it doesn't work as specified, replace it. Disconnect the battery cable and drain the coolant. Remove the engine cooling fan, air cleaner, and air intake duct. Remove the upper radiator hose, unbolt the coolant tube, and loosen the hose clamp. Remove the thermostat housing cover, remove the drivebelts, and the water pump drain plug. Detach the lower radiator hose and the coolant by-pass hose, remove the intake manifold, detach the hose from the water outlet housing, and remove the water outlet cover. Scrape off any old gasket or sealant, clean them with lacquer thinner, and apply a bead of RTV sealant. Installation is the reverse of removal. Bolt the cover in place and wait for the sealant to cure. Refill and bleed the cooling system, run the engine, and check for leaks and proper operation.

Genuine Nissan Frontier Thermostat

Engine Coolant Thermostat

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12 Thermostats found

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Nissan Frontier Thermostat Assembly
Part Number: 21200-31U1B
$29.66 MSRP: $43.75
You Save: $14.09 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Replaces: 21200-31U13
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2019 Nissan Frontier | LE, Off-Road, PRO-4X, S, SE, SL, SV | 6 Cyl 4.0L | VQ40DE
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Nissan Frontier Thermostat Assembly
Part Number: 21200-EA000
$25.10 MSRP: $39.62
You Save: $14.52 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Manufacturer Note: OPEN TEMP=82+-1.5
- Replaces: 21200-6N210
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2019 Nissan Frontier | S, SE, SV, XE | 4 Cyl 2.5L | QR25DE
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Nissan Frontier Thermostat Assembly
Part Number: 21200-53J00
$26.26 MSRP: $40.20
You Save: $13.94 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-0C82A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2004 Nissan Frontier | SE, STD, XE | 4 Cyl 2.4L | KA24DE
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Nissan Frontier Thermostat Assembly
Part Number: 21200-6N210
$25.10 MSRP: $39.62
You Save: $14.52 (37%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-EA000
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2007 Nissan Frontier | XE | 4 Cyl 2.5L | QR25DE
View related parts
Nissan Frontier Thermostat Assembly
Part Number: 21200-31U13
$28.59 MSRP: $43.75
You Save: $15.16 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-31U1B
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2009 Nissan Frontier | LE, Off-Road, SE | 6 Cyl 4.0L | VQ40DE
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Nissan Frontier Sensor Assy-Thermister
Part Number: 27723-8J000
$39.80 MSRP: $53.07
You Save: $13.27 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assy-Intake; Thermostat Amplifier, Thermostatic Switch
- Replaces: 27732-8J000
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2004 Nissan Frontier | SC, SE, XE | 4 Cyl 2.4L, 6 Cyl 3.3L | KA24DE, VG33E
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Nissan Frontier Engine Coolant Thermostat Radiator
Part Number: 21200-V7205
$28.93 MSRP: $44.27
You Save: $15.34 (35%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-V720A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2002 Nissan Frontier | SE, XE | 6 Cyl 3.3L | VG33E
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Nissan Frontier Thermostat Assembly
Part Number: 21200-V7206
$28.93 MSRP: $44.27
You Save: $15.34 (35%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-V720A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2001-2004 Nissan Frontier | SE, XE | 6 Cyl 3.3L | VG33E
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Nissan Frontier Thermostat Assembly
Part Number: 21200-42L06
$21.26 MSRP: $32.53
You Save: $11.27 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-42L0A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2001-2004 Nissan Frontier | SC | 6 Cyl 3.3L | VG33E
View related parts
Nissan Frontier Thermostat Assembly
Part Number: 21200-0C811
$26.26 MSRP: $40.20
You Save: $13.94 (35%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-0C82A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2004 Nissan Frontier | SE, STD, XE | 4 Cyl 2.4L | KA24DE
View related parts
Nissan Frontier Thermostat Assembly
Part Number: 21200-42L05
$22.06 MSRP: $32.53
You Save: $10.47 (33%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-42L0A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2000-2002 Nissan Frontier | SC | 6 Cyl 3.3L | VG33E
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Nissan Frontier Thermostat Assy
Part Number: 21200-9BT0A
$37.89 MSRP: $55.90
You Save: $18.01 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2020-2024 Nissan Frontier | PRO-4X, PRO-X, S, SV | 6 Cyl 3.8 L GAS

Nissan Frontier Thermostat

The Thermostat used in Nissan Frontier vehicles is amongst the vital components in any car since it maintains the optimum temperature to allow the engine to work as required. Sitting adjacent to the radiator, the thermostat is a closed loop control unit which, with the help of a sensing bulb, monitors temperature fluctuations and alters the circulation of coolant. This mechanism avoids the situation where the engine combusts at high temperatures or works at low temperatures sine both are unfriendly to the engine. The Frontier has from time to time incorporated the different types of thermostats which include the bimetallic strip as a mechanical thermostat and the wax pellet thermostat. It works on the principle of to change its size with heat and thus can control the temperatures of the engines. The above mentioned thermostat models are a mirrors of the development of automotive industry producing better and more reliable thermostats that enhance the efficiency of Nissan Frontier's cooling system.

If you need any OEM Nissan Frontier Thermostat, feel free to choose them out of our huge selection of genuine Nissan Frontier Thermostat. All our parts are offered at unbeatable prices and are supported by the manufacturer's warranty. In addition, we offer quick shipping to have your parts delivered to your door step in a matter of days.

Nissan Frontier Thermostat Parts Questions & Experts Answers

Thermostat Assembly
21200-0C811
Q: How to testing, remove, and replace a thermostat in a Nissan Frontier's cooling system?
A: To properly test a thermostat, suspend the (closed) thermostat on a string in a container of cold water, with a thermometer and heat the water on a stove. Write down the temperature when the thermostat begins to open and when it is fully open. If it doesn't work as specified, replace it. Disconnect the battery cable and drain the coolant. Remove the engine cooling fan, air cleaner, and air intake duct. Remove the upper radiator hose, unbolt the coolant tube, and loosen the hose clamp. Remove the thermostat housing cover, remove the drivebelts, and the water pump drain plug. Detach the lower radiator hose and the coolant by-pass hose, remove the intake manifold, detach the hose from the water outlet housing, and remove the water outlet cover. Scrape off any old gasket or sealant, clean them with lacquer thinner, and apply a bead of RTV sealant. Installation is the reverse of removal. Bolt the cover in place and wait for the sealant to cure. Refill and bleed the cooling system, run the engine, and check for leaks and proper operation.