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While an engine generates a lot of heat, there are certain situations where it would not be beneficial for coolant to be flowing through the radiator and cooling down. All motors operate most efficiently within a narrow temperature range, and the cooling system is designed not to keep the engine as cool as possible, but to actually keep it within this specific range of temperature values. A key component in making this happen is the thermostat. The thermostat is a device that is placed in-line with the piping leading from the engine block to the radiator. There is a temperature sensor inside of the thermostat that measures the surrounding water to determine if it is necessary for it to cool down. If it is above a certain value, usually 195 degrees or greater, the thermostat stays open and the coolant is able to circulate to the radiator. However, if the liquid temperature is below this value, a valve inside the thermostat seals off the passage to the radiator, and the coolant is shunted back inside the engine so it can warm up. A thermostat is particularly useful for people who live in cold climates, as the temperature of the coolant when they start the car is usually below zero on a winter’s day. In order to help get the engine’s temperature back up to operating range as quickly as possible, the thermostat stays closed from the moment the car is started until it finally warms up enough to provide normal operation.

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    Behr
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Best Selling Genuine Replacement Thermostats

  • Constantly Updated Inventory of Replacement Thermostat Parts
  • We stock Discount Thermostat OEM Parts

We stock Thermostat parts for most makes, including AM General, Acura, Audi, Austin, BMW, Buick, Cadillac, Chevrolet, Chrysler, Daewoo, Daihatsu, Datsun, Dodge, Eagle, Emergency One, Evobus, Fiat, Ford, Foton, Freightliner, GMC, Geo, Grande West, Honda, Hummer, Hyundai, Indiana Phoenix, Infiniti, International, Isuzu, Jaguar, Jeep, Kenworth, Kia, Land Rover, Lexus, Lincoln, MASA, MG, Mack, Mazda, Mercedes Benz, Mercury, Merkur, Mini, Mitsubishi, Nissan, Oldsmobile, Peugeot, Plymouth, Pontiac, Porsche, Ram, Renault, Rover, Saab, Saturn, Scion, Smart, Sterling, Sterling Truck, Stewart & Stevenson, Subaru, Sutphen Corp., Suzuki, Temsa Bus, Toyota, Triumph, VAM, Volkswagen, Volvo, Western RV, Western Star.


Kuzeh
1998 Subaru Forester Engine Coolant Thermostat Kuzeh - (78°C/172°F)

P311-0505FED    W0133-1635045  New

Qty:
In Stock & Ready to Ship
$24.67
Kuzeh Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Gasket Serviced Separately
  • (78°C/172°F)
  • 78°C/172°F (OE temp.)
Brand: Kuzeh
Additional Fitment Information:
Vehicle
1998 - Subaru Forester
Kuzeh
2000 Subaru Forester Engine Coolant Thermostat Kuzeh - (78°C/172°F)

P311-0505FED    W0133-1635045  New

Qty:
In Stock & Ready to Ship
$24.67
Kuzeh Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • (78°C/172°F)
Brand: Kuzeh
Additional Fitment Information:
Vehicle
2000 - Subaru Forester
Kuzeh
2017 Toyota Highlander Engine Coolant Thermostat 4 Cyl 2.7L Kuzeh - (82°C/180°F) w/o Gasket

P311-39BAD69    W0133-1917688  New

Qty:
In Stock & Ready to Ship
$28.10
Kuzeh Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • (82°C/180°F) w/o Gasket
Brand: Kuzeh
Additional Fitment Information:
Vehicle Block Engine CID CC
2017 - Toyota Highlander L 4 Cyl 2.7L 163 2672
Kuzeh
1997 Toyota Tacoma Engine Coolant Thermostat 6 Cyl 3.4L Kuzeh - (82°C/180°F)

P311-0566FC5    W0133-1633966  New

Qty:
In Stock & Ready to Ship
$28.32
Kuzeh Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • (82°C/180°F)
Brand: Kuzeh
Additional Fitment Information:
Vehicle Block Engine CID CC
1997 - Toyota Tacoma V 6 Cyl 3.4L - 3378
Mahle
2001 Infiniti QX4 Engine Coolant Thermostat Mahle - (76.5°C/170°F)

P311-4A5F126    W0133-1786921  New

Qty:
In Stock & Ready to Ship
$39.49
Mahle Engine Coolant Thermostat
  • Integrated Housing
  • Main - Engine Block
  • Includes Coolant Outlet Housing and Seal - 76.5°C/170°F
  • (76.5°C/170°F)
  • 76.5°C/170°F (OE temp)
Brand: Mahle
Additional Fitment Information:
Vehicle
2001 - Infiniti QX4
Mahle
2005 Nissan 350Z Engine Coolant Thermostat Mahle - (76.5°C/170°F)

P311-4A5F126    W0133-1786921  New

Qty:
In Stock & Ready to Ship
$39.49
Mahle Engine Coolant Thermostat
  • Integrated Housing
  • (76.5°C/170°F)
Brand: Mahle
Additional Fitment Information:
Vehicle
2005 - Nissan 350Z
ACDelco
2007 Chevrolet Trailblazer Engine Coolant Thermostat 8 Cyl 5.3L ACDelco

P311-0277E91    W0133-1821992  New

Qty:
In Stock & Ready to Ship
$77.30
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • Includes Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2007 - Chevrolet Trailblazer V 8 Cyl 5.3L 325 5328
ACDelco
2009 Chevrolet Express 2500 Engine Coolant Thermostat 8 Cyl 6.0L ACDelco

P311-0277E91    W0133-1821992  New

Qty:
In Stock & Ready to Ship
$77.30
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2009 - Chevrolet Express 2500 V 8 Cyl 6.0L 364 5967
ACDelco
2007 GMC Sierra 1500 Engine Coolant Thermostat 8 Cyl 4.8L ACDelco

P311-0277E91    W0133-1821992  New

Qty:
In Stock & Ready to Ship
$77.30
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • w/o Housing
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2007 - GMC Sierra 1500 V 8 Cyl 4.8L 294 -
ACDelco
2016 Chevrolet LCF 3500 Engine Coolant Thermostat ACDelco

P311-0277E91    W0133-1821992  New

Qty:
In Stock & Ready to Ship
$77.30
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • Incl.Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Fuel Type
2016 - Chevrolet LCF 3500 FLEX
Mahle
2007 Nissan 350Z Engine Coolant Thermostat Mahle - (76.5°C/170°F)

P311-4A5F126    W0133-1786921  New

Qty:
In Stock & Ready to Ship
$39.49
Mahle Engine Coolant Thermostat
  • Integrated Housing
  • Production: -10/31/2006
  • (76.5°C/170°F)
Brand: Mahle
Additional Fitment Information:
Vehicle Prod. Date Range
2007 - Nissan 350Z To:10-31-06
Mahle
2003 Infiniti QX4 Engine Coolant Thermostat Mahle - (76.5°C/170°F)

P311-4A5F126    W0133-1786921  New

Qty:
In Stock & Ready to Ship
$39.49
Mahle Engine Coolant Thermostat
  • Integrated Housing
  • Main - Engine Block
  • (76.5°C/170°F)
Brand: Mahle
Additional Fitment Information:
Vehicle
2003 - Infiniti QX4
Mahle
2003 Nissan 350Z Engine Coolant Thermostat Mahle - (76.5°C/170°F)

P311-4A5F126    W0133-1786921  New

Qty:
In Stock & Ready to Ship
$39.49
Mahle Engine Coolant Thermostat
  • Integrated Housing
  • Production: 06/2002-
  • (76.5°C/170°F)
Brand: Mahle
Additional Fitment Information:
Vehicle Prod. Date Range
2003 - Nissan 350Z Fr:06-00-02
Mahle
2002 Daewoo Nubira Engine Coolant Thermostat Mahle - Behr

P311-2B0FF83    W0133-1610836  New

Qty:
In Stock & Ready to Ship
$38.13
Mahle Engine Coolant Thermostat
  • Includes Coolant Outlet Housing and O-Ring
  • Behr
Brand: Mahle
Additional Fitment Information:
Vehicle
2002 - Daewoo Nubira
ACDelco
2010 Chevrolet Silverado 2500 HD Engine Coolant Thermostat 8 Cyl 6.6L ACDelco

P311-5F4CEDF    W0133-1694073  New

Qty:
In Stock & Ready to Ship
$82.82
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • with 185°F
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - Chevrolet Silverado 2500 HD V 8 Cyl 6.6L 403 6599
ACDelco
2018 Chevrolet Silverado 3500 HD Engine Coolant Thermostat 8 Cyl 6.6L ACDelco

P311-5F4CEDF    W0133-1694073  New

Qty:
In Stock & Ready to Ship
$82.82
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • Optional, 185 Degrees F, Incl.Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2018 - Chevrolet Silverado 3500 HD V 8 Cyl 6.6L 403 6599
ACDelco
2011 Chevrolet Express 3500 Engine Coolant Thermostat 8 Cyl 6.6L ACDelco

P311-5F4CEDF    W0133-1694073  New

Qty:
In Stock & Ready to Ship
$82.82
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • with 185°F and with Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2011 - Chevrolet Express 3500 V 8 Cyl 6.6L 403 6599
ACDelco
2012 Chevrolet Silverado 3500 HD Engine Coolant Thermostat 8 Cyl 6.6L ACDelco

P311-4BD529D    W0133-1694074  New

Qty:
In Stock & Ready to Ship
$72.38
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • with 180°F
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2012 - Chevrolet Silverado 3500 HD V 8 Cyl 6.6L 403 6599
ACDelco
2018 Chevrolet Silverado 2500 HD Engine Coolant Thermostat 8 Cyl 6.6L ACDelco

P311-4BD529D    W0133-1694074  New

Qty:
In Stock & Ready to Ship
$72.38
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • Optional, 180 Degrees F, Incl.Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2018 - Chevrolet Silverado 2500 HD V 8 Cyl 6.6L 403 6599
ACDelco
2012 Chevrolet Express 3500 Engine Coolant Thermostat 8 Cyl 6.6L ACDelco

P311-4BD529D    W0133-1694074  New

Qty:
In Stock & Ready to Ship
$72.38
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • with 180°F and with Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2012 - Chevrolet Express 3500 V 8 Cyl 6.6L 403 6599