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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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The Following brands are available based on your search.

  • ACDelco
    ACDelco
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    Aisin
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    Beck Arnley
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    Behr
  • Bosch
    Bosch
  • CRP
    CRP
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    Calorstat
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    Derale
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    Dorman
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    Eurospare
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    Facet
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    Febi
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    Fel-Pro
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    Four Seasons
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    Gates
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    Genuine
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    Hella
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    Jet Performance
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    Kuzeh
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    MTC
  • Mahle
    Mahle
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    Mando
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    Metrix
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    Meyle
  • Mopar
    Mopar
  • Motorad
    Motorad
  • Motorcraft
    Motorcraft
  • Mr Gasket
    Mr Gasket
  • NTC - TAMA
    NTC - TAMA
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    OEQ
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    Omix-Ada
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    Original Equipment
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    PRW
  • Painless Wiring
    Painless Wiring
  • Professional Parts Sweden
    Professional Parts Sweden
  • Rein
    Rein
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    Stant
  • Tuff Stuff Performance Accessories
    Tuff Stuff Performance Accessories
  • URO Parts
    URO Parts
  • Vemo
    Vemo
  • Wahler
    Wahler
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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, Genesis, Geo, Grande West, Honda, Hummer, Hyundai, INFINITI, 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, Omega, 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.


Mahle
2001 BMW 320i Engine Coolant Thermostat Mahle - Behr with Housing & Seal

P311-42D7231    W0133-1662661  New

Qty:
In Stock & Ready to Ship
$70.57
Mahle 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.
  • With Housing and Seal
  • Behr with Housing & Seal
  • W/ Housing
Brand: Mahle
Additional Fitment Information:
Vehicle
2001 - BMW 320i
Mahle
2000 BMW 323Ci Engine Coolant Thermostat Mahle - Behr with Housing & Seal

P311-42D7231    W0133-1662661  New

Qty:
In Stock & Ready to Ship
$70.57
Mahle 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.
  • Behr with Housing & Seal
Brand: Mahle
Additional Fitment Information:
Vehicle
2000 - BMW 323Ci
Mahle
1998 BMW Z3 Engine Coolant Thermostat 6 Cyl 2.8L Mahle - Behr with Housing & Seal

P311-42D7231    W0133-1662661  New

Qty:
In Stock & Ready to Ship
$70.57
Mahle 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.
  • Production: 09/01/1998-
  • Behr with Housing & Seal
Brand: Mahle
Additional Fitment Information:
Vehicle Block Engine CID CC Prod. Date Range
1998 - BMW Z3 L 6 Cyl 2.8L - 2793 Fr:09-01-98
ACDelco
2004 Saab 9-3 Engine Coolant Thermostat ACDelco

P311-1D50E6E    W0133-1866553  New

Qty:
In Stock & Ready to Ship
$93.91
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
2004 - Saab 9-3
ACDelco
2005 Chevrolet Suburban 2500 Engine Coolant Thermostat 8 Cyl 6.0L ACDelco - w/o O-Ring

P311-3D33C49    W0133-1783286  New

Qty:
In Stock & Ready to Ship
$40.26
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
  • w/o O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2005 - Chevrolet Suburban 2500 V 8 Cyl 6.0L 364 5967
ACDelco
2005 Pontiac GTO Engine Coolant Thermostat ACDelco - w/o O-Ring

P311-3D33C49    W0133-1783286  New

Qty:
In Stock & Ready to Ship
$40.26
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
  • w/o O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle
2005 - Pontiac GTO
ACDelco
2003 Chevrolet Silverado 1500 Engine Coolant Thermostat 8 Cyl 5.3L ACDelco - w/o O-Ring

P311-3D33C49    W0133-1783286  New

Qty:
In Stock & Ready to Ship
$40.26
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
  • Except Integrated Housing Design

    w/o Housing
  • w/o O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2003 - Chevrolet Silverado 1500 V 8 Cyl 5.3L 325 5328
ACDelco
2005 Chevrolet Corvette Engine Coolant Thermostat ACDelco - w/o O-Ring

P311-3D33C49    W0133-1783286  New

Qty:
In Stock & Ready to Ship
$40.26
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 O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle
2005 - Chevrolet Corvette
ACDelco
2003 GMC Sierra 2500 Engine Coolant Thermostat ACDelco - w/o O-Ring

P311-3D33C49    W0133-1783286  New

Qty:
In Stock & Ready to Ship
$40.26
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 Integrated Housing Design

    w/o Housing
  • w/o O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle
2003 - GMC Sierra 2500
ACDelco
2007 GMC Sierra 1500 HD Classic Engine Coolant Thermostat ACDelco - w/o O-Ring

P311-3D33C49    W0133-1783286  New

Qty:
In Stock & Ready to Ship
$40.26
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
  • w/o O-Ring
Brand: ACDelco
Additional Fitment Information:
Vehicle
2007 - GMC Sierra 1500 HD Classic
ACDelco
2006 Chevrolet Silverado 3500 Engine Coolant Thermostat 8 Cyl 6.0L ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
In Stock & Ready to Ship
$75.42
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 Housing
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2006 - Chevrolet Silverado 3500 V 8 Cyl 6.0L 364 5967
ACDelco
2001 Chevrolet Suburban 2500 Engine Coolant Thermostat 8 Cyl 6.0L ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
In Stock & Ready to Ship
$75.42
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
  • Except Integrated Housing Design

    with Housing
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2001 - Chevrolet Suburban 2500 V 8 Cyl 6.0L 364 5967
ACDelco
2002 Chevrolet Tahoe Engine Coolant Thermostat ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
In Stock & Ready to Ship
$75.42
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 Housing

    w/o Integrated Housing Design
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle
2002 - Chevrolet Tahoe
ACDelco
1997 Chevrolet Corvette Engine Coolant Thermostat ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
In Stock & Ready to Ship
$75.42
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 Two Bolt Pattern
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle
1997 - Chevrolet Corvette
ACDelco
1999 GMC Sierra 2500 Engine Coolant Thermostat ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
In Stock & Ready to Ship
$75.42
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 Integrated Housing Design

    with Housing
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle
1999 - GMC Sierra 2500
ACDelco
2003 GMC Envoy XL Engine Coolant Thermostat 8 Cyl 5.3L ACDelco

P311-03992A8    W0133-1686955  New

Qty:
In Stock & Ready to Ship
$73.05
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 Integrated Housing Design
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2003 - GMC Envoy XL V 8 Cyl 5.3L 325 5328
ACDelco
2002 Chevrolet Tahoe Engine Coolant Thermostat ACDelco

P311-03992A8    W0133-1686955  New

Qty:
In Stock & Ready to Ship
$73.05
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 Housing

    with Integrated Housing Design
Brand: ACDelco
Additional Fitment Information:
Vehicle
2002 - Chevrolet Tahoe
ACDelco
1998 Chevrolet Camaro Engine Coolant Thermostat 8 Cyl 5.7L ACDelco

P311-03992A8    W0133-1686955  New

Qty:
In Stock & Ready to Ship
$73.05
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 Three Bolt Housing
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
1998 - Chevrolet Camaro V 8 Cyl 5.7L 350 -
ACDelco
2003 Chevrolet Corvette Engine Coolant Thermostat ACDelco

P311-03992A8    W0133-1686955  New

Qty:
In Stock & Ready to Ship
$73.05
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 Three Bolt Pattern
Brand: ACDelco
Additional Fitment Information:
Vehicle
2003 - Chevrolet Corvette
ACDelco
2003 Chevrolet Express 3500 Engine Coolant Thermostat 8 Cyl 6.0L ACDelco

P311-03992A8    W0133-1686955  New

Qty:
In Stock & Ready to Ship
$73.05
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
2003 - Chevrolet Express 3500 V 8 Cyl 6.0L 364 5967