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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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    Aisin
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    Beck Arnley
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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, Dodge, Eagle, Fiat, Ford, Freightliner, GMC, Geo, Honda, Hummer, Hyundai, Infiniti, International, Isuzu, Jaguar, Jeep, Kenworth, Kia, Land Rover, Lexus, Lincoln, 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, Subaru, Suzuki, Toyota, Triumph, Volkswagen, Volvo, Western Star.


Behr
2001 Audi A4 Quattro Engine Coolant Thermostat 4 Cyl 1.8L Behr - (87C-102C)

P311-5EF0D1A    W0133-1638227  New

Qty:
25.23
Behr 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.
  • 87°C/102°C - OE Temperature - Includes O-Ring
  • (87C-102C)
  • 87c
Brand: Behr
Additional Fitment Information:
Vehicle Block Engine CID CC
2001 - Audi A4 Quattro L 4 Cyl 1.8L - 1781
Behr
2000 Volkswagen Golf Engine Coolant Thermostat 4 Cyl 1.8L Behr - (87C-102C)

P311-5EF0D1A    W0133-1638227  New

Qty:
25.23
Behr 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 87°C/102°C
  • 87°C/102°C - OE Temperature - Includes O-Ring
  • (87C-102C)
  • 87c
Brand: Behr
Additional Fitment Information:
Vehicle Block Engine CID CC
2000 - Volkswagen Golf L 4 Cyl 1.8L - 1781
ACDelco
2005 Chevrolet Avalanche 2500 Engine Coolant Thermostat ACDelco

P311-0438E89    W0133-1694589  New

Qty:
25.44
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 O-Ring - 195°F
Brand: ACDelco
Additional Fitment Information:
Vehicle
2005 - Chevrolet Avalanche 2500
ACDelco
2001 Chevrolet Suburban 2500 Engine Coolant Thermostat 8 Cyl 8.1L ACDelco

P311-0438E89    W0133-1694589  New

Qty:
25.44
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
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2001 - Chevrolet Suburban 2500 V 8 Cyl 8.1L 496 -
ACDelco
1999 GMC Savana 3500 Engine Coolant Thermostat 8 Cyl 7.4L ACDelco

P311-0438E89    W0133-1694589  New

Qty:
25.44
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
1999 - GMC Savana 3500 V 8 Cyl 7.4L 454 -
ACDelco
1997 Chevrolet P30 Engine Coolant Thermostat 8 Cyl 7.4L ACDelco

P311-0438E89    W0133-1694589  New

Qty:
25.44
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 RPO L29
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
1997 - Chevrolet P30 V 8 Cyl 7.4L 454 -
ACDelco
2002 Chevrolet C3500HD Engine Coolant Thermostat 8 Cyl 8.1L ACDelco

P311-0438E89    W0133-1694589  New

Qty:
25.44
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 Block Engine CID CC
2002 - Chevrolet C3500HD V 8 Cyl 8.1L 496 -
ACDelco
2000 Chevrolet Tahoe Engine Coolant Thermostat 8 Cyl 4.8L ACDelco

P311-03992A8    W0133-1686955  New

Qty:
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
  • Includes Coolant Outlet Housing and O-Ring. Used On Pumps with Casting # 12562459. If Water Pump Has Been Replaced By 2004 or Newer Pump, Must Also Use 2004 or Newer Inlet.
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2000 - Chevrolet Tahoe V 8 Cyl 4.8L 294 -
ACDelco
2000 Chevrolet Corvette Engine Coolant Thermostat ACDelco

P311-03992A8    W0133-1686955  New

Qty:
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
  • Includes Coolant Outlet Housing and O-Ring. Used On Pumps with Casting # 12562459. If Water Pump Has Been Replaced By 2004 or Newer Pump, Must Also Use 2004 or Newer Inlet.
Brand: ACDelco
Additional Fitment Information:
Vehicle
2000 - Chevrolet Corvette
ACDelco
2005 Hummer H2 Engine Coolant Thermostat ACDelco

P311-03992A8    W0133-1686955  New

Qty:
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 and with Three Bolt Pattern
  • Includes Coolant Outlet Housing and O-Ring. Used On Pumps with Casting # 12562459. If Water Pump Has Been Replaced By 2004 or Newer Pump, Must Also Use 2004 or Newer Inlet.
Brand: ACDelco
Additional Fitment Information:
Vehicle
2005 - Hummer H2
ACDelco
2006 Saab 9-7x Engine Coolant Thermostat 8 Cyl 5.3L ACDelco

P311-03992A8    W0133-1686955  New

Qty:
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
  • ; Production: -12/31/2005, with Integrated Housing Design
  • Includes Coolant Outlet Housing and O-Ring. Used On Pumps with Casting # 12562459. If Water Pump Has Been Replaced By 2004 or Newer Pump, Must Also Use 2004 or Newer Inlet.
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC Prod. Date Range
2006 - Saab 9-7x V 8 Cyl 5.3L 325 5328 To:12-31-05
ACDelco
2006 Saab 9-7x Engine Coolant Thermostat 8 Cyl 5.3L ACDelco

P311-03992A8    W0133-1686955  New

Qty:
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
  • ; Production: 01/01/2006-, with Integrated Housing Design
  • Includes Coolant Outlet Housing and O-Ring. Used On Pumps with Casting # 12562459. If Water Pump Has Been Replaced By 2004 or Newer Pump, Must Also Use 2004 or Newer Inlet.
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC Prod. Date Range
2006 - Saab 9-7x V 8 Cyl 5.3L 325 5328 Fr:01-01-06
ACDelco
2006 Chevrolet Trailblazer EXT Engine Coolant Thermostat 8 Cyl 5.3L ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
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 Trailblazer EXT V 8 Cyl 5.3L 325 5328
ACDelco
2001 Chevrolet Silverado 1500 HD Engine Coolant Thermostat ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
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
  • Includes Coolant Outlet Housing and Gasket
Brand: ACDelco
Additional Fitment Information:
Vehicle
2001 - Chevrolet Silverado 1500 HD
ACDelco
2001 GMC Sierra 1500 Engine Coolant Thermostat 8 Cyl 4.8L ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
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 - GMC Sierra 1500 V 8 Cyl 4.8L 294 -
ACDelco
2002 Chevrolet Corvette Engine Coolant Thermostat ACDelco

P311-3787E2C    W0133-1783287  New

Qty:
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
2002 - Chevrolet Corvette
NTC - TAMA
1997 Acura CL Engine Coolant Thermostat 4 Cyl 2.2L NTC - TAMA - (78°C/172°F)

P311-1E8EC1A    W0133-1711725  New

Qty:
22.88
NTC - TAMA 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 - OE Temp - The rubber thermostat gasket is serviced separately.
  • (78°C/172°F)
  • OE Temp - 78°C/172°F
Brand: NTC - TAMA
Additional Fitment Information:
Vehicle Block Engine CID CC
1997 - Acura CL L 4 Cyl 2.2L - 2156
NTC - TAMA
1999 Acura CL Engine Coolant Thermostat 4 Cyl 2.3L NTC - TAMA - (78°C/172°F)

P311-1E8EC1A    W0133-1711725  New

Qty:
22.88
NTC - TAMA 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: NTC - TAMA
Additional Fitment Information:
Vehicle Block Engine CID CC
1999 - Acura CL L 4 Cyl 2.3L - 2254
NTC - TAMA
2010 Nissan Xterra Engine Coolant Thermostat NTC - TAMA - (82°C/180°F)

P311-0E219A8    W0133-1795311  New

Qty:
40.52
NTC - TAMA 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: NTC - TAMA
Additional Fitment Information:
Vehicle
2010 - Nissan Xterra
ACDelco
2008 GMC Yukon Engine Coolant Thermostat ACDelco

P311-0277E91    W0133-1821992  New

Qty:
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
2008 - GMC Yukon