How to testing, remove, and replace a thermostat in a Nissan Pathfinder'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 Pathfinder Thermostat

Engine Coolant Thermostat

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15 Thermostats found

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Nissan Pathfinder 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:
- 2005-2012 Nissan Pathfinder | LE, S, SE, SE Off-Road, SV, Silver Edition, XE | 6 Cyl 4.0L | VQ40DE
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Nissan Pathfinder Thermostat Assembly
Part Number: 21200-9HP0A
$28.32 MSRP: $41.77
You Save: $13.45 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat, Thermostat Unit
- Replaces: 21200-JA10A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2022-2024 Nissan Pathfinder
- 2013-2020 Nissan Pathfinder | Platinum, S, SL, SV | 6 Cyl 3.5L | VQ35DD, VQ35DE
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Nissan Pathfinder 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:
- 2014 Nissan Pathfinder | Platinum, SL, SV | 4 Cyl 2.5L | QR25DER
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Nissan Pathfinder Thermostat Assembly
Part Number: 21200-AD201
$21.54 MSRP: $32.97
You Save: $11.43 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-1LA1A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2007-2012 Nissan Pathfinder | LE, SE | 8 Cyl 5.6L | VK56DE
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Nissan Pathfinder Thermostat Assembly
Part Number: 21200-4W010
$27.81 MSRP: $42.57
You Save: $14.76 (35%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-4W01B
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2000-2004 Nissan Pathfinder | LE, SE, XE | 6 Cyl 3.5L | VQ35DE
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Nissan Pathfinder 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:
- 2005-2008 Nissan Pathfinder | LE, S, SE, SE Off-Road, XE | 6 Cyl 4.0L | VQ40DE
View related parts
Nissan Pathfinder Engine Coolant Thermostat Housing
Part Number: 21200-JA10A
$28.32 MSRP: $41.77
You Save: $13.45 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-9HP0A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2013-2015 Nissan Pathfinder | Platinum, S, SL, SV | 6 Cyl 3.5L | VQ35DE
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Nissan Pathfinder Engine Coolant Thermostat
Part Number: 21200-V5015
$20.93 MSRP: $30.88
You Save: $9.95 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1992-1995 Nissan Pathfinder | SE, ST, XE | 6 Cyl 3.0L | VG30E
- 1987-1990 Nissan Pathfinder | SE, ST | 6 Cyl 3.0L | VG30I
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Nissan Pathfinder 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:
- 1997-2002 Nissan Pathfinder | LE, SE, XE | 6 Cyl 3.3L | VG33E
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Nissan Pathfinder 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:
- 2001-2003 Nissan Pathfinder | XE | 6 Cyl 3.3L | VG33E
View related parts
Nissan Pathfinder Thermostat Assembly
Part Number: 21200-4W000
$21.71 MSRP: $32.02
You Save: $10.31 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat, Thermostat Outlet
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2000-2004 Nissan Pathfinder | SE, XE | 6 Cyl 3.5L | VQ35DE
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Nissan Pathfinder Thermostat Assembly
Part Number: 21200-80W00
$20.68 MSRP: $30.50
You Save: $9.82 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Manufacturer Note: 82C
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1987-1990 Nissan Pathfinder | DX | 4 Cyl 2.4L | Z24I
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Nissan Pathfinder Thermostat Assembly
Part Number: 21200-0B000
$28.93 MSRP: $44.27
You Save: $15.34 (35%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: 82
- Replaced by: 21200-V720A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1996-1998 Nissan Pathfinder | LE, SE, XE | 6 Cyl 3.3L | VG33E
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Nissan Pathfinder Thermostat Assembly
Part Number: 21200-42L00
$21.11 MSRP: $26.92
You Save: $5.81 (22%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Manufacturer Note: 76.5C
- Replaced by: 21200-42L01
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1987-1993 Nissan Pathfinder | SE, ST, XE | 6 Cyl 3.0L | VG30E, VG30I
View related parts
Nissan Pathfinder Thermostat Assembly
Part Number: 21200-80W05
Product Specifications
- Other Name: Thermostat Assy
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1987-1990 Nissan Pathfinder | DX | 4 Cyl 2.4L | Z24I

Nissan Pathfinder Thermostat

If you need any OEM Nissan Pathfinder Thermostat, feel free to choose them out of our huge selection of genuine Nissan Pathfinder 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 Pathfinder Thermostat Parts Questions & Experts Answers

Thermostat Assembly
21200-0B000
Q: How to testing, remove, and replace a thermostat in a Nissan Pathfinder'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.