Toyota Thermostats

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What does a factory Toyota & Scion thermostat do, and how does it work? The short answer: it helps prevent engine overheats. However, how a simple valve in a cooling system does this is a little more complex. Yes, the original thermostat in your Toyota or Scion opens and closes, most often using a spring or piston. And yes, this regulates coolant circulation through your engine and radiator. But, for making sure coolant stays at the right temperature range, whether it's warm or cold out, their precise timing is key. If your temperature gauge gives constant readings, centered or just on the cold side, your thermostat is working normally. Thermostats don't really go bad with age, either. So, when to replace a car thermostat isn't a question that usually comes up. However, like any auto part, they can fail. Signs that a thermostat isn't working include a Check Engine light, the valve not opening or closing properly, and a stuck valve, but these usually show as engine and HVAC problems. If the valve malfunctions, it can't move coolant correctly; coolant can then either get trapped in your engine, causing an overheat, or circulate too much, keeping it from reaching the right temperature. As a result, engine efficiency tanks, and your AC and heating system can stop heating properly. That's not to mention that overheats can damage the valve, valve housing, and the surrounding hoses and gaskets. Nearby auto parts can even warp and malfunction. If you need to replace your car thermostat, the best choice for the project is a genuine Toyota & Scion thermostat. Avoid the hassle of searching for the right fit -- order yours from our online auto parts counter today.
Thermostat
Part Number: 32971-48030
Other Names: Thermostat Transmission More Names
Description: 3.5L. More Info
Fits:
  • Toyota:
    • Highlander
$161.42
$111.01
$161.42
$111.01
Thermostat
Part Number: 90916-03147
Other Names: Thermostat Element More Names
Description: IQ. More Info
Fits:
  • Scion:
    • iQ
$29.48
$22.15
$29.48
$22.15
Thermostat
Part Number: 32971-WAA01
Other Names: Thermostat Transmission More Names
Description: 3.0L. 2.0L. More Info
Fits:
  • Toyota:
    • GR Supra
$86.97
$59.82
$86.97
$59.82
Thermostat
Part Number: 32971-45010
Other Names: Thermostat Transmission More Names
Description: 3.5L, 2017-20. More Info
Fits:
  • Toyota:
    • Sienna
$161.42
$111.01
$161.42
$111.01
Thermostat Housing
Part Number: 16031-0P010
Other Names: Thermostat, Water Inlet, Inlet Tube, Thermostat Unit, Inlet Sub-Assembly Wate More Names
Replaces: 16031-31010, 16031-31011
Description: 4Runner. Tacoma. Tundra. FJ Cruiser. 4.0L, with thermostat. 4-runner. 6 cylinder. Includes water inlet. More Info
Notes: Included with water inlet. Included with water separator. Includes Thermostat And Gasket. Includes Water Inlet And Gasket. More Notes
Fits:
  • Toyota:
    • 4Runner,
    • FJ Cruiser,
    • Tacoma,
    • Tundra
$51.00
$36.79
$51.00
$36.79
Thermostat Housing
Part Number: 16321-11011
Other Names: Engine Coolant Thermostat Housing, Inlet Water More Names
Description: Tercel. Paseo. Liftback, sedan, wagon. Water inlet. Auto trans. More Info
Fits:
  • Toyota:
    • Paseo,
    • Tercel
$56.34
$40.64
$56.34
$40.64
Thermostat Housing
Part Number: 16321-22050
Other Names: Engine Coolant Thermostat Housing, Inlet Water More Names
Replaces: 16321-22060
Description: Celica. MR2. To 05/2000. Type-B. Gt. To 04-00. More Info
Fits:
  • Toyota:
    • Celica,
    • Corolla,
    • MR2 Spyder
$62.06
$44.77
$62.06
$44.77
Thermostat Housing
Part Number: 16321-22070
Other Names: Water Inlet, Engine Coolant Thermostat Housing, Inlet Water More Names
Description: Corolla. Matrix. Celica. MR2. Without xrs. Gt. From 04-00. To 05/2000. Type-C. From 04/2000. More Info
Fits:
  • Toyota:
    • Celica,
    • Corolla,
    • Matrix,
    • MR2 Spyder
$20.11
$15.11
$20.11
$15.11
Thermostat Housing
Part Number: 16323-0P010
Positions: Lower
Other Names: Water Inlet, Water Separator, Engine Coolant Thermostat Housing, Housing Water Inlet More Names
Replaces: 16323-31011
Description: Tacoma. FJ Cruiser. 4.0L, without towing package. 4-runner. 6 cylinder. From 3/04. 4.0L, without oil cooler. Exc.Towing Package.... More Info
Fits:
  • Toyota:
    • 4Runner,
    • FJ Cruiser,
    • Tacoma
$145.04
$99.76
$145.04
$99.76
Thermostat Gasket
Part Number: 16325-0T030
Other Names: Thermostat Seal, Thermostat Housing Seal, Gasket, Water Inlet Gasket, Engine Coolant Thermostat Seal, Engine Coolant Thermostat... More Names
Replaces: 16325-0H030, 16325-28010
Notes: Part cannot be reused/reinstalled. More Notes
Fits:
  • Scion:
    • iM,
    • tC,
    • xB,
    • xD
  • Toyota:
    • C-HR,
    • Camry,
    • Corolla,
    • Corolla iM,
    • Highlander,
    • Matrix,
    • RAV4,
    • Sienna,
    • Solara,
    • Venza
  • 9 more
$6.69
$5.03
$6.69
$5.03
Thermostat Housing
Part Number: 16331-35051
Other Names: Engine Coolant Thermostat Housing, Outlet Water More Names
Replaces: 16331-35050
Description: Pick-up, 4-runner. Gas. 4 cylinder. Carb. More Info
Fits:
  • Toyota:
    • Pickup
$64.33
$46.42
$64.33
$46.42
Thermostat Gasket
Part Number: 16326-37020
Other Names: Thermostat Housing Gasket, Water Inlet Gasket, Gasket Water Inlet More Names
Description: Without prime. Prius V. Prius Prime. Prius AWD-e. 1.8L, reservoir & hoses, with hybrid le. More Info
Notes: Included with thermostat housing. Included with water inlet. Part cannot be reused/reinstalled. More Notes
Fits:
  • Toyota:
    • Corolla,
    • Prius,
    • Prius AWD-e,
    • Prius Plug-In,
    • Prius Prime,
    • Prius V
  • 1 more
$5.43
$4.08
$5.43
$4.08
Thermostat Gasket
Part Number: 16346-50010
Other Names: Gasket, Gasket Thermostat More Names
Description: Tundra. Sequoia. Land Cruiser. 4.7L. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Land Cruiser,
    • Sequoia,
    • Tundra
$5.55
$4.16
$5.55
$4.16
Thermostat Unit
Part Number: 32971-34030
Other Names: Thermostat Transmission More Names
Description: 4.6L, with towing package. More Info
Fits:
  • Toyota:
    • Tundra
$161.42
$111.01
$161.42
$111.01
Thermostat Housing
Part Number: 16323-0P030
Positions: Lower
Other Names: Housing, Water Inlet, Engine Coolant Thermostat Housing, Housing Water Inlet More Names
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
  • 1 more
$83.75
$57.60
$83.75
$57.60
Thermostat Housing
Part Number: 16321-10011
Other Names: Engine Coolant Thermostat Housing, Inlet Water More Names
Description: Tercel. Paseo. Liftback, sedan, wagon. Water inlet. Manual trans. More Info
Fits:
  • Toyota:
    • Paseo,
    • Tercel
$56.34
$40.64
$56.34
$40.64
Thermostat Housing
Part Number: 16321-20030
Positions: Upper
Other Names: Water Inlet, Cover, Engine Coolant Thermostat Housing, Inlet Water More Names
Replaces: 16321-0A030
Description: Solara. Avalon. Sienna. Camry. Highlander Hybrid. 3.0l, 3.3l. 3.0 & 3.3L. 2008-10. From 01/2003. More Info
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna,
    • Solara
$78.44
$56.59
$78.44
$56.59
Thermostat Housing
Part Number: 16323-31020
Positions: Lower
Other Names: Engine Coolant Thermostat Housing, Multiple-Part Name Code More Names
Description: Towing Package. 4-runner. 6 cylinder. 4.0L, with oil cooler. More Info
Fits:
  • Toyota:
    • 4Runner
$79.85
$57.61
$79.85
$57.61
Thermostat Gasket
Part Number: 16325-36010
Other Names: Engine Coolant Thermostat Housing Seal, Thermostat Unit Seal, Water Inlet Seal, Gasket Water Inlet More Names
Description: Camry Hybrid. Avalon hybrid. 2.5L. More Info
Notes: Included with thermostat unit. Included with water inlet w/thermostat. More Notes
Fits:
  • Toyota:
    • Avalon,
    • Camry
$5.37
$4.04
$5.37
$4.04
Thermostat Housing
Part Number: 16331-35041
Other Names: Engine Coolant Thermostat Housing, Outlet Water More Names
Replaces: 16331-35040
Description: Celica. Pick-up, 4-runner. Gas. 4 cylinder. Fuel injection. 2wd. Without trailer pkg. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Celica,
    • Pickup
$62.81
$45.31
$62.81
$45.31
Thermostat Housing
Part Number: 16321-0F010
Other Names: Water Inlet, Thermostat Cover, Housing, Inlet Tube, Inlet Water More Names
Replaces: 16321-50020
Description: Tundra. Sequoia. Land Cruiser. 4.7L. Outlet. Water inlet. Cover. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Land Cruiser,
    • Sequoia,
    • Tundra
$68.90
$49.70
$68.90
$49.70
Thermostat Housing Stud
Part Number: 90080-11541
Other Names: Engine Coolant Thermostat Housing Stud, Bolt Stud More Names
Replaces: 92122-60612
Fits:
  • Toyota:
    • Highlander
$1.41
$1.06
$1.41
$1.06
Thermostat Housing Bolt
Part Number: 90105-A0338
Other Names: Engine Coolant Thermostat Housing Bolt, Bolt Flange More Names
Replaces: 90105-06352
Description: Hatchback,. More Info
Fits:
  • Toyota:
    • Corolla
$0.72
$0.54
$0.72
$0.54
Engine Coolant Thermostat
Part Number: 90916-03079
Other Names: Thermostat More Names
Description: T100. 6 cylinder. Pick-up, 4-runner. Gas. Without turbo. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Pickup,
    • T100
$35.52
$26.69
$35.52
$26.69
Engine Coolant Thermostat
Part Number: 90916-03093
Other Names: Thermostat More Names
Fits:
  • Scion:
    • xA,
    • xB
  • Toyota:
    • 4Runner,
    • Echo,
    • Prius,
    • Supra,
    • Tacoma,
    • Yaris
  • 3 more
$28.69
$21.56
$28.69
$21.56
Thermostat Housing Stud
Part Number: 90080-11540
Other Names: Engine Coolant Thermostat Housing Stud, Bolt Stud More Names
Replaces: 90116-06070
Description: 3.3L. 3.0L. More Info
Fits:
  • Toyota:
    • Highlander
$1.41
$1.06
$1.41
$1.06
Engine Coolant Thermostat
Part Number: 90916-03075
Other Names: Thermostat More Names
Fits:
  • Toyota:
    • 4Runner,
    • Camry,
    • Celica,
    • MR2,
    • T100,
    • Tacoma,
    • Tundra
  • 2 more
$35.52
$26.69
$35.52
$26.69
Engine Coolant Thermostat
Part Number: 90916-03136
Other Names: Thermostat More Names
Replaces: 90916-C3001
Fits:
  • Scion:
    • tC,
    • xB
  • Toyota:
    • Camry,
    • Corolla,
    • Highlander,
    • Matrix,
    • RAV4,
    • Solara
  • 3 more
$28.52
$21.44
$28.52
$21.44
Engine Coolant Thermostat
Part Number: 90916-03046
Other Names: Thermostat More Names
Replaces: 90916-03069
Fits:
  • Toyota:
    • Camry,
    • Celica,
    • Corolla,
    • MR2,
    • Paseo,
    • RAV4,
    • Tercel,
    • Van
  • 3 more
$28.69
$21.56
$28.69
$21.56
Engine Coolant Thermostat
Part Number: 90916-03078
Other Names: Thermostat More Names
Replaces: 90916-03022, 90916-03023, 90916-03029, 90916-03036, 90916-03040, 90916-03055
Description: Supra. Cressida. Celica. Starlet. Pick-up, 4-runner. Gas. Without turbo. 4 cylinder. All. Without fuji thomson. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Celica,
    • Corolla,
    • Cressida,
    • Pickup,
    • Starlet,
    • Supra
  • 2 more
$28.52
$21.44
$28.52
$21.44
Engine Coolant Thermostat
Part Number: 90916-03125
Other Names: Thermostat More Names
Description: From 07/00. More Info
Fits:
  • Toyota:
    • Celica,
    • Corolla,
    • MR2 Spyder
$28.58
$21.48
$28.58
$21.48
Engine Coolant Thermostat
Part Number: 90916-03145
Other Names: Thermostat More Names
Description: Corolla. Matrix. 1.8L, japan built, type c. 1.8L, auto trans, type c. Vendor:fuji seiko. More Info
Notes: Order by description. More Notes
Fits:
  • Scion:
    • xD
  • Toyota:
    • Corolla,
    • Matrix
$28.49
$21.41
$28.49
$21.41
Thermostat Housing Gasket
Part Number: 16326-37010
Other Names: Engine Coolant Thermostat Housing Gasket, Gasket Water Inlet More Names
Description: Without valvematic eng. More Info
Notes: Included with timing cover. More Notes
Fits:
  • Scion:
    • xD
  • Toyota:
    • Corolla,
    • Matrix
$8.27
$6.21
$8.27
$6.21
Engine Coolant Thermostat
Part Number: 90916-03090
Other Names: Thermostat More Names
Replaces: 90916-03060
Fits:
  • Toyota:
    • Camry,
    • Celica,
    • Corolla,
    • MR2,
    • RAV4,
    • Solara
  • 1 more
$35.82
$26.93
$35.82
$26.93
Engine Coolant Thermostat
Part Number: 90916-03138
Other Names: Thermostat More Names
Description: Tundra. Sequoia. 4.7L. 4-runner. 8 cylinder. From 07/2006. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Land Cruiser,
    • Sequoia,
    • Tundra
$48.99
$36.81
$48.99
$36.81
Engine Coolant Thermostat
Part Number: 90916-A3003
Other Names: Thermostat More Names
Replaces: 90916-03084, 90916-03129
Fits:
  • Scion:
    • tC,
    • xD
  • Toyota:
    • Avalon,
    • Camry,
    • Celica,
    • Corolla,
    • Highlander,
    • Matrix,
    • MR2 Spyder,
    • RAV4,
    • Sienna,
    • Solara,
    • Venza
  • 8 more
$28.58
$21.48
$28.58
$21.48
Engine Coolant Thermostat Gasket
Part Number: 16341-35010
Other Names: Thermostat Gasket, Water Inlet Gasket, Gasket Water Outlet More Names
Replaces: 16341-65010
Description: All models. 6 cylinder. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Celica,
    • Cressida,
    • Pickup,
    • Supra,
    • T100
  • 1 more
$3.19
$2.40
$3.19
$2.40
Engine Coolant Thermostat Housing
Part Number: 16031-24011
Other Names: Thermostat Housing, Water Inlet, Engine Coolant Inlet Flange, Inlet Sub Assembly Wate More Names
Replaces: 16031-24010
Description: Corolla hatchback. Sedan, 2.0L, reservoir & hoses. Water inlet. More Info
Notes: Includes Thermostat. More Notes
Fits:
  • Toyota:
    • Corolla
$57.87
$41.75
$57.87
$41.75
Engine Coolant Thermostat Housing
Part Number: 16321-65030
Other Names: Thermostat Housing, Water Inlet, Inlet Water More Names
Replaces: 16321-65010, 16321-65020
Description: T100. 6 cylinder. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Pickup,
    • T100
$55.60
$40.10
$55.60
$40.10
Engine Coolant Thermostat Housing
Part Number: 16323-0S020
Positions: Lower
Other Names: Water Inlet, Thermostat Housing, Housing Water Inlet More Names
Replaces: 16323-38010
Description: Sequoia. Tundra. Land Cruiser. 5.7L, without towing package. Regular cab, double cab. Exc.Towing Package. More Info
Fits:
  • Toyota:
    • Land Cruiser,
    • Sequoia,
    • Tundra
$65.48
$47.24
$65.48
$47.24
Engine Coolant Thermostat Housing
Part Number: 16323-20020
Positions: Lower
Other Names: Thermostat Housing, Housing, Water Inlet, Housing Water Inlet More Names
Replaces: 16323-0A020, 16323-0A021
Description: Sienna. Highlander Hybrid. 3.0 & 3.3L. From 01/2003. More Info
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna,
    • Solara
$164.84
$113.37
$164.84
$113.37
Engine Coolant Thermostat Gasket
Part Number: 16325-62010
Other Names: Thermostat Gasket, Gasket, Thermostat Seal, Water Inlet Gasket, Water Inlet Seal, Thermostat Housing Gasket, Thermostat, Engine... More Names
Replaces: 16325-0H020
Fits:
  • Scion:
    • xA,
    • xB,
    • xD
  • Toyota:
    • 4Runner,
    • Avalon,
    • Camry,
    • Celica,
    • Corolla,
    • Echo,
    • Highlander,
    • Matrix,
    • MR2,
    • MR2 Spyder,
    • Previa,
    • Prius,
    • RAV4,
    • Sienna,
    • Solara,
    • Supra,
    • T100,
    • Tacoma,
    • Tundra,
    • Venza,
    • Yaris
  • 19 more
$7.07
$5.31
$7.07
$5.31
Engine Coolant Thermostat Gasket
Part Number: 16346-66020
Other Names: Gasket Thermostat More Names
Fits:
  • Toyota:
    • Land Cruiser
$5.55
$4.16
$5.55
$4.16
Engine Coolant Thermostat Housing
Part Number: 16323-0S030
Positions: Lower
Other Names: Housing, Thermostat Housing, Water Inlet, Engine Coolant Inlet Flange, Housing Water Inlet More Names
Replaces: 16323-38050
Description: Tundra. Sequoia. 4.6L. Japan part. Housing. More Info
Fits:
  • Toyota:
    • Sequoia,
    • Tundra
$73.47
$53.00
$73.47
$53.00
Engine Coolant Thermostat Gasket
Part Number: 16325-76010
Other Names: Gasket, Thermostat O-Ring, Thermostat Gasket, Gasket Water Inlet More Names
Replaces: 16325-0C030
Description: Tacoma. 4Runner. O-Ring. 2.7L. From 03/96. More Info
Fits:
  • Toyota:
    • 4Runner,
    • Previa,
    • T100,
    • Tacoma
$6.69
$5.03
$6.69
$5.03
Engine Coolant Thermostat Gasket
Part Number: 16326-47020
Other Names: Gasket, Water Inlet Gasket, Thermostat Gasket, Thermostat Housing O-Ring, Thermostat Housing Gasket, Water Outlet Gasket, Gasket... More Names
Replaces: 16326-47010
Description: Prius C. RAV4. IQ. Avalon hybrid. 2019-20, reservoir & hoses. O-Ring. 2.5L. 2021, reservoir & hoses. More Info
Notes: Included with water inlet. Included with water outlet. Included with thermostat housing. More Notes
Fits:
  • Scion:
    • iQ
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Prius C,
    • RAV4
  • 1 more
$0.86
$0.65
$0.86
$0.65
Engine Coolant Thermostat Housing Gasket
Part Number: 16325-0P020
Other Names: Thermostat Housing Gasket, Thermostat Housing Seal, Housing Gasket, Gasket Water Inlet More Names
Description: Exc.Japan Built. Engine # 6xxxxxx-84xxxxx. Engine # axxxxxx-lxxxxxx. 3.5L, us built. Engine # dxxxxxx-gxxxxxx. 3.5L, without hybrid,... More Info
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
  • 1 more
$2.36
$1.78
$2.36
$1.78
Engine Coolant Thermostat Housing Gasket
Part Number: 16119-66020
Other Names: Gasket Thermostat G More Names
Fits:
  • Toyota:
    • Land Cruiser
$6.44
$4.84
$6.44
$4.84
Engine Coolant Thermostat Housing Gasket
Part Number: 16325-31010
Other Names: Housing Gasket, Thermostat Housing Gasket, Thermostat Gasket, Thermostat Housing Seal, Gasket Water Inlet More Names
Description: RAV4. Engine # 0xxxxxx-9xxxxxx. Japan Built Part. 3.5L, japan built. Engine # 0xxxxxx-5xxxxxx. 2011-13. Exc.Japan Built. Engine #... More Info
Fits:
  • Toyota:
    • 4Runner,
    • Avalon,
    • Camry,
    • FJ Cruiser,
    • Highlander,
    • RAV4,
    • Sienna,
    • Tacoma,
    • Tundra,
    • Venza
  • 5 more
$1.95
$1.46
$1.95
$1.46
Thermostat
Part Number: 90916-03052
Replaces: 90916-03071
Description: Land Cruiser. More Info
Fits:
  • Toyota:
    • Land Cruiser
$58.79
$42.41
$58.79
$42.41

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