Toyota Sienna Thermostat

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We stock Genuine OEM Toyota® Thermostat for your Toyota Sienna. OEM thermostats are designed and manufactured to fit and function perfectly with your specific make and model of vehicle. They are designed to regulate the flow of coolant through your engine, ensuring that your engine operates at the correct temperature range. A malfunctioning thermostat can cause overheating, poor fuel efficiency, and potential engine damage, so replacing it with an OEM part can ensure optimal performance and reliability. Additionally, using an OEM thermostat can help ensure that the part is covered under the manufacturer's warranty. Manufacturer's Warranty Included. Guaranteed Fit. Experts standing by.

Thermostat
Part Number: 32971-45010
Toyota Toyota
Other Names: Thermostat Transmission
Description: 3.5L, 2017-20.
Fits:
  • Toyota:
    • Sienna
MSRP $194.72
$132.28
MSRP $194.72
$132.28
Thermostat Housing
Part Number: 16321-20030
Toyota Toyota
Options: Upper
Other Names: Engine Coolant Thermostat Housing, Water Inlet, Cover, Inlet Water
Replaces: 16321-0A030
Description: Solara. 3.3l. Avalon. Sienna. 3.0 & 3.3L. 2008-10. 3.0L. Highlander Hybrid. From 01/2003.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna,
    • Solara
MSRP $94.33
$64.08
MSRP $94.33
$64.08
Thermostat Housing
Part Number: 16323-0P030
Toyota Toyota
Options: Lower
Other Names: Housing, Water Inlet, Engine Coolant Thermostat Housing, Housing Water Inlet
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
MSRP $101.25
$68.78
MSRP $101.25
$68.78
1994-2019 Toyota Engine Coolant Thermostat 2.5L 3.0L 2.7L 2.4L 3.3L
Part Number: 90916A3003
Toyota Toyota
Other Names: Thermostat
Replaces: 90916-03084, 90916-03129
Fits:
  • Scion:
    • tC,
    • xD
  • Toyota:
    • Avalon,
    • Camry,
    • Celica,
    • Corolla,
    • Highlander,
    • Matrix,
    • MR2 Spyder,
    • RAV4,
    • Sienna,
    • Solara,
    • Venza
MSRP $30.63
$20.81
MSRP $30.63
$20.81
Engine Coolant Thermostat
Part Number: 90916-A3002
Toyota Toyota
Other Names: Thermostat
Replaces: 90916-03133, 90916-03140, 90916-A3001
Notes: Order by description.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Corolla,
    • Highlander,
    • Matrix,
    • RAV4,
    • Sienna,
    • Venza
MSRP $30.58
$20.77
MSRP $30.58
$20.77
Engine Coolant Thermostat Housing
Part Number: 16031-25011
Toyota Toyota
Other Names: Engine Coolant Thermostat Kit, Thermostat, Water Inlet, Thermostat Housing, Thermostat Unit, Inlet Sub Assembly Wate
Replaces: 16031-25010
Notes: Includes Gasket & Thermostat. Part has related component that cannot be reused/reinstalled. o-ring.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • RAV4 Prime,
    • Sienna,
    • Venza
MSRP $74.42
$50.56
MSRP $74.42
$50.56
Engine Coolant Thermostat Housing
Part Number: 16031-25040
Toyota Toyota
Other Names: Thermostat Unit, Thermostat Housing, Thermostat, Engine Coolant Thermostat, Engine Coolant Thermostat Kit, Water Inlet, Inlet Sub...
Description: From 09/2021. Incl.Gasket,Housing and Thermostat. From 10/2020. Prime plug-in, reservoir & hoses. From 08/2021. 2.5L, with thermostat.
Notes: Part has related component that cannot be reused/reinstalled. o-ring.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • RAV4 Prime,
    • Sienna,
    • Venza
MSRP $74.42
$50.56
MSRP $74.42
$50.56
Engine Coolant Thermostat Housing
Part Number: 16323-20020
Toyota Toyota
Options: Lower
Other Names: Thermostat Housing, Housing, Water Inlet, Housing Water Inlet
Replaces: 16323-0A020, 16323-0A021
Description: Sienna. 3.0 & 3.3L. Highlander Hybrid. From 01/2003.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna,
    • Solara
MSRP $198.63
$134.93
MSRP $198.63
$134.93
Engine Coolant Thermostat Gasket
Part Number: 16326-31050
Toyota Toyota
Other Names: Water Inlet Gasket, Thermostat Gasket, Gasket, Water Outlet Gasket, Thermostat Housing Gasket, Thermostat Unit O-Ring, Water Inlet...
Replaces: 16326-31010, 16326-31020
Description: Highlander. Tacoma. Sienna. 3.5L, 2017-20, type 2. 3.5L, thermostat & hoses. Avalon. Camry. O-Ring. 3.5L, with hybrid, 2017-19.
Notes: Included with water outlet. Included with water inlet. Part cannot be reused/reinstalled. Included with thermostat housing. Part cannot...
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna,
    • Tacoma
MSRP $0.92
$0.66
MSRP $0.92
$0.66
Engine Coolant Thermostat Housing Gasket
Part Number: 16325-31010
Toyota Toyota
Other Names: Housing Gasket, Thermostat Housing Gasket, Thermostat Gasket, Thermostat Housing Seal, Gasket Water Inlet
Description: Engine # 0xxxxxx-9xxxxxx. Japan Built Part. 3.5L, japan built. RAV4. Exc.Japan Built. Engine # 0xxxxxx-5xxxxxx. Engine #...
Fits:
  • Toyota:
    • 4Runner,
    • Avalon,
    • Camry,
    • FJ Cruiser,
    • Highlander,
    • RAV4,
    • Sienna,
    • Tacoma,
    • Tundra,
    • Venza
MSRP $2.41
$1.74
MSRP $2.41
$1.74
Water Inlet Sub-Assembly, With Thermostat
Part Number: 16031-31031
Toyota Toyota
Other Names: Thermostat, Thermostat Housing, Thermostat Unit, Inlet Sub Assembly Wate
Replaces: 16031-31030
Description: Fits Avalon, Camry, Highlander, Sienna All. Camry. Sienna. Avalon. Highlander. 3.5L, 2017-20. 3.5L, with...
Notes: Includes Thermostat And Gasket. Part has related components that cannot be reused/reinstalled. gasket.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna
MSRP $74.42
$50.56
MSRP $74.42
$50.56
Engine Coolant Thermostat Housing Gasket
Part Number: 16325-0P020
Toyota Toyota
Other Names: Thermostat Housing Gasket, Thermostat Housing Seal, Housing Gasket, Gasket Water Inlet
Description: Engine # 6xxxxxx-84xxxxx. Engine # axxxxxx-lxxxxxx. Exc.Japan Built. Engine # dxxxxxx-gxxxxxx. 3.5L, without hybrid, 2014-16. Engine #...
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
MSRP $2.90
$2.09
MSRP $2.90
$2.09
Engine Coolant Thermostat Housing O-Ring
Part Number: 16326-47020
Toyota Toyota
Other Names: Engine Coolant Thermostat Gasket, Thermostat Gasket, Gasket, Water Inlet Gasket, Thermostat Housing O-Ring, Thermostat Unit Gasket,...
Replaces: 16326-47010
Notes: Included with water inlet. Includes water inlet. Part cannot be reused/reinstalled. Included with thermostat housing. Part cannot be...
Fits:
  • Scion:
    • iQ
  • Toyota:
    • Avalon,
    • Camry,
    • Corolla,
    • Corolla Cross,
    • Highlander,
    • Prius C,
    • RAV4,
    • RAV4 Prime,
    • Sienna,
    • Venza
MSRP $1.12
$0.80
MSRP $1.12
$0.80
Engine Coolant Thermostat Housing O-Ring
Part Number: 16326-25010
Toyota Toyota
Other Names: Thermostat Housing O-Ring, Thermostat Gasket, Engine Coolant Thermostat Housing Gasket, Thermostat Unit Gasket, Engine Coolant...
Description: 2.5L. From 09/2021. O-Ring. Highlander. From 10/21. From 10/2020. Prime plug-in, reservoir & hoses. From 08/2021.
Notes: Included with thermostat housing. Part cannot be reused/reinstalled.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • RAV4 Prime,
    • Sienna
MSRP $5.98
$4.31
MSRP $5.98
$4.31
Thermostat Bracket
Part Number: 32914-08010
Toyota Toyota
Other Names: Stay Transmission O
Description: 3.5L, 2017-20.
Fits:
  • Toyota:
    • Sienna
MSRP $24.14
$16.69
MSRP $24.14
$16.69
Thermostat Housing
Part Number: 16321-20020
Toyota Toyota
Other Names: Water Inlet, Cover, Housing, Inlet Water
Replaces: 16321-0A010
Description: Avalon. Sienna. 6 cylinder. Camry.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Sienna
MSRP $113.81
$77.31
MSRP $113.81
$77.31
Thermostat Housing Stud
Part Number: 90126-10043
Toyota Toyota
Other Names: Stud Hexalobular
Replaces: 90126-C0022
Description: 2.7L.
Fits:
  • Toyota:
    • Sienna
MSRP $2.56
$1.85
MSRP $2.56
$1.85
Water Inlet
Part Number: 16321-31030
Toyota Toyota
Options: Upper
Other Names: Thermostat Housing, Engine Coolant Thermostat Housing, Inlet Water
Replaces: 16321-31011
Description: RAV4. Without hybrid. Sienna. Camry. Japan built. Highlander. Venza. To 07/2007. Engine # 0xxxxxx-9xxxxxx. Engine # 0xxxxxx-5xxxxxx.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
MSRP $49.76
$33.81
MSRP $49.76
$33.81
Gasket, Water Inlet Housing, No. 1
Part Number: 16325-0T030
Toyota Toyota
Other Names: Thermostat Seal, Thermostat Housing Seal, Water Inlet Gasket, Engine Coolant Thermostat Gasket, Gasket, Engine Coolant Thermostat...
Replaces: 16325-0H030, 16325-28010
Notes: Part cannot be reused/reinstalled.
Fits:
  • Scion:
    • iM,
    • tC,
    • xB,
    • xD
  • Toyota:
    • C-HR,
    • Camry,
    • Corolla,
    • Corolla iM,
    • Highlander,
    • Matrix,
    • RAV4,
    • Sienna,
    • Solara,
    • Venza
MSRP $8.13
$5.87
MSRP $8.13
$5.87
Housing
Part Number: 16323-31040
Toyota Toyota
Options: Lower
Other Names: Thermostat Housing, Engine Coolant Thermostat Housing, Housing Water Inlet
Replaces: 16323-0W011
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
MSRP $94.33
$64.08
MSRP $94.33
$64.08
Housing
Part Number: 16323-20010
Toyota Toyota
Options: Lower
Other Names: Engine Coolant Thermostat Housing, Thermostat Housing, Housing Water Inlet
Replaces: 16323-0A010
Description: 3.0L. Sienna. 3.0 & 3.3L.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Sienna,
    • Solara
MSRP $264.39
$179.61
MSRP $264.39
$179.61
Gasket, Water Inlet Housing, No. 1
Part Number: 16325-62010
Toyota Toyota
Other Names: Thermostat Gasket, Gasket, Thermostat Seal, Water Inlet Gasket, Water Inlet Seal, Thermostat Housing Gasket, Engine Coolant...
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
MSRP $8.56
$6.18
MSRP $8.56
$6.18
Water Inlet
Part Number: 16321-0P010
Toyota Toyota
Options: Upper
Other Names: Water Inlet Pipe, Thermostat Housing, Inlet Connector, Engine Coolant Thermostat Housing, Inlet Water
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
MSRP $47.18
$32.05
MSRP $47.18
$32.05
Engine Timing Cover Bolt
Part Number: 90105-A0168
Toyota Toyota
Other Names: Timing Cover Bolt, Thermostat Housing Bolt, Bolt Flange
Replaces: 91552-F1055
Description: Type 2. 2.7L.
Fits:
  • Toyota:
    • Prius V,
    • Sienna
MSRP $2.56
$1.85
MSRP $2.56
$1.85
Water Inlet
Part Number: 16032-0V050
Toyota Toyota
Other Names: Thermostat Housing, Water Pump Housing, Housing Sub Assembly Wa
Description: 2.7L. Sienna.
Notes: Includes Water Pump And Gasket.
Fits:
  • Toyota:
    • Highlander,
    • Sienna,
    • Venza
MSRP $618.18
$419.96
MSRP $618.18
$419.96
Engine Coolant Outlet Flange
Part Number: 16351-25040
Toyota Toyota
Other Names: Outlet Assembly, Water Manifold, Engine Coolant Thermostat, Water Outlet, Outlet Water By Pas
Description: Location-Engine Cylinder Head. Thermostat & hoses. Outlet assy. 2.5L. Water manifold. Venza.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • RAV4 Prime,
    • Sienna,
    • Venza
MSRP $49.33
$33.52
MSRP $49.33
$33.52
Engine Coolant Outlet Gasket
Part Number: 16345-F0020
Toyota Toyota
Other Names: Outlet Assembly Gasket, Water Manifold Gasket, Engine Coolant Thermostat Gasket, Gasket Water Outlet
Replaces: 16345-25030
Description: Location-Engine Cylinder Head. Thermostat & hoses. 2.5L.
Notes: Part cannot be reused/reinstalled.
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • RAV4 Prime,
    • Sienna,
    • Venza
MSRP $4.94
$3.56
MSRP $4.94
$3.56
A/C Evaporator Temperature Sensor
Part Number: 88625-41030
Toyota Toyota
Options: Front
Other Names: Thermistor, Thermistor Probe, HVAC Evaporator Temperature Switch, In-Car Sensor, Thermostatic Switch, Thermistor Cooler
Replaces: 88620-06020
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna,
    • Venza
MSRP $21.55
$14.89
MSRP $21.55
$14.89
Engine Water Pump Housing Gasket
Part Number: 16326-36010
Toyota Toyota
Other Names: Water Inlet Gasket, Water Pump Assembly Gasket, Housing Gasket, Thermostat Housing Gasket, Gasket Water Inlet
Description: 2.7L. With hybrid. Sienna.
Fits:
  • Scion:
    • tC
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • RAV4,
    • Sienna,
    • Venza
MSRP $30.43
$20.67
MSRP $30.43
$20.67
Engine Coolant Outlet Gasket
Part Number: 16326-31040
Toyota Toyota
Options: Rear
Other Names: Thermostat Gasket, Water Outlet Gasket, Outlet Assembly O-Ring, Water Outlet Seal, Gasket, Gasket Water Inlet
Description: Rear Outlet. 3.5L, thermostat & hoses. Water outlet gasket. Camry. 3.5L, with hybrid, 2017-19. 3.5L, 2017-20.
Notes: Included with thermostat. Included with water outlet. Part cannot be reused/reinstalled. Included with outlet assembly. Part cannot be...
Fits:
  • Toyota:
    • Avalon,
    • Camry,
    • Highlander,
    • Sienna,
    • Tacoma
MSRP $0.92
$0.66
MSRP $0.92
$0.66
A/C Evaporator Temperature Sensor
Part Number: 88620-0E050
Toyota Toyota
Other Names: HVAC Evaporator Temperature Switch, Thermistor, Thermostatic Switch, Temp Sensor, Refrigerant Temp Sensor, Ambient Temp Sensor,...
Replaces: 88620-28050
Notes: Included with AC & heater assembly. Included with evaporator assembly.
Fits:
  • Toyota:
    • Avalon,
    • C-HR,
    • Camry,
    • Corolla,
    • Highlander,
    • Prius Prime,
    • RAV4,
    • RAV4 Prime,
    • Sienna,
    • Venza
MSRP $51.25
$34.82
MSRP $51.25
$34.82
Tire Pressure Monitoring System (TPMS) Control Module Nut
Part Number: 90178-A0023
Toyota Toyota
Options: Left Rear, Right Rear, Front Rear, Rear
Other Names: Fan Blade Nut, Window Regulator Nut, Door Check Nut, Insert Panel Nut, Spoiler Nut, Engine Coolant Thermostat Housing Nut,...
Replaces: 9004A-17219, 90178-T0018, 90178-W0019, 94151-80600
Notes: Included with front door side impact sensor.
Fits:
  • Scion:
    • iM,
    • iQ,
    • tC,
    • xB
  • Toyota:
    • Avalon,
    • bZ4X,
    • Camry,
    • Corolla,
    • Corolla Cross,
    • Corolla iM,
    • Highlander,
    • Land Cruiser,
    • Mirai,
    • Prius,
    • Prius Plug-In,
    • Prius V,
    • RAV4,
    • RAV4 Prime,
    • Sequoia,
    • Sienna,
    • Tundra,
    • Venza,
    • Yaris
MSRP $1.41
$1.02
MSRP $1.41
$1.02
1987-2004 Toyota Engine Coolant Thermostat 1.6L 1.8L 2.0L 2.2L
Part Number: 9091603090
Toyota Toyota
Other Names: Thermostat
Replaces: 90916-03060
Fits:
  • Toyota:
    • Camry,
    • Celica,
    • Corolla,
    • MR2,
    • RAV4,
    • Solara
MSRP $38.27
$26.00
MSRP $38.27
$26.00

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