Subaru Thermostats

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A car thermostat plays a significant role in your engine’s health and performance because it helps regulate and monitor vehicle temperature. Are you in need of a thermostat for your vehicle? SubaruOnlineParts carries genuine OEM thermostats compatible with the Subaru Legacy, Outback, Brat, DL, GL, GL-10, Justy, Loyale, RX, Standard, and XT.


Thermostat
Part Number: 21210AA290
Options: Upper
Other Names: Thermostat And Gasket Ay More Names
Description: 2.5L, thermostat. Forester. 2.5L, upper. More Info
MSRP $35.75
$25.31
MSRP $35.75
$25.31
Thermostat
Part Number: 21210AA300
Description: Crosstrek. Impreza. 2.0L, with hybrid. More Info
Notes: Includes Gasket. More Notes
MSRP $35.75
$25.31
MSRP $35.75
$25.31
Thermostat
Part Number: 21200AA080
Description: All models. Xt6. XT coupe. 2.7l. More Info
MSRP $22.28
$15.78
MSRP $22.28
$15.78
Thermostat
Part Number: 21200KA131
Replaces: 21200KA130
Description: Justy. With fuel injection. More Info
MSRP $22.28
$15.78
MSRP $22.28
$15.78
Thermostat
Part Number: 21210AA160
Other Names: Thermostat And Gasket Ay More Names
Description: Legacy. With turbo. More Info
MSRP $35.75
$25.31
MSRP $35.75
$25.31
Thermostat
Part Number: 21210AA120
Other Names: Thermostat And Gasket Ay More Names
Description: Legacy. Without turbo. Outback. More Info
MSRP $32.08
$22.72
MSRP $32.08
$22.72
Thermostat
Part Number: 21210AA260
Other Names: Thermostat And Gasket Ay More Names
Description: 2.5L. Legacy, Outback. XV Crosstrek, Crosstrek. More Info
Notes: Includes Gasket. More Notes
MSRP $41.25
$29.21
MSRP $41.25
$29.21
Thermostat
Part Number: 73540FL640
Other Names: Thms Thermo Ay More Names
Description: With hybrid. More Info
Notes: Included with AC & heater assembly. More Notes
MSRP $49.68
$35.18
MSRP $49.68
$35.18
Thermostat Cover
Part Number: 11060AA150
Other Names: Thermostat Housing, Cover Thermo More Names
Description: Legacy/Outback. 3.0l. 2006-07. Tribeca. More Info
MSRP $26.13
$18.50
MSRP $26.13
$18.50
Thermostat Housing
Part Number: 11060AA390
Options: Upper
Other Names: Thermostat Cover, Cover Thermo More Names
Description: 2.5L, thermostat. 2.5L, upper. More Info
MSRP $18.23
$12.91
MSRP $18.23
$12.91
Thermostat Unit
Part Number: 21200AA200
Other Names: Thermostat Assembly More Names
Description: 2.5L without turbo, 2010-12. More Info
MSRP $22.28
$15.78
MSRP $22.28
$15.78
Thermostat Housing
Part Number: 11060AA061
Other Names: Water Inlet, Thermostat Cover, Engine Coolant Thermostat Housing, Cover Thermo More Names
Replaces: 11060AA060
Notes: Included with repair kit. Included with thermostat unit. More Notes
MSRP $32.82
$23.23
MSRP $32.82
$23.23
Thermostat Housing
Part Number: 11060AA071
Other Names: Thermostat Cover, Cover Thermo More Names
Replaces: 11060AA050, 11060AA070
Description: Without turbo. Manual trans. 2.5L, 2002-05. Forester. All. Impreza. 2.5l. 2.5L, 2005. 2.5L, 2006-07. Baja. Legacy/Outback. 2.5l. More Info
MSRP $24.32
$17.22
MSRP $24.32
$17.22
Thermostat Gasket
Part Number: 21236AA010
Other Names: Thermostat Gasket, Engine Coolant Thermostat Gasket, Thermostat Housing Gasket, Thermostat Unit Gasket, Thermostat Cover Gasket,... More Names
Replaces: 21236AA000
Notes: Included with repair kit. Included with thermostat unit. More Notes
MSRP $3.75
$2.66
MSRP $3.75
$2.66
Thermostat Housing
Part Number: 417545900
Other Names: Cover Thermo More Names
Description: All models. Justy. Without fuel injection. More Info
MSRP $17.60
$12.46
MSRP $17.60
$12.46
Thermostat Housing
Part Number: 11060AA290
Options: Upper
Other Names: Cover Thermo More Names
Description: BRZ. Upper, auto trans only. More Info
MSRP $18.23
$12.91
MSRP $18.23
$12.91
Thermostat Cover
Part Number: 11060AA360
Options: Rear
Other Names: Thermostat Housing, Cover Thermo More Names
Description: Rear. 2.0L, without hybrid, auto trans only. More Info
Notes: Included with water pipe. More Notes
MSRP $18.25
$12.92
MSRP $18.25
$12.92
Thermostat Unit
Part Number: 21210AA080
Other Names: Thermostat, Thermostat And Gasket Ay More Names
Description: 3.6L. Legacy/Outback. 2.5l. Tribeca. 2008-14. 2.5L without turbo, 2009-10. Legacy/Outback. 3.0l. 2006-07. More Info
MSRP $32.08
$22.72
MSRP $32.08
$22.72
Thermostat Gasket
Part Number: 21236AA070
Options: Front
Other Names: Gasket, Gasket Thermo More Names
Description: WRX. Front. Crosstrek. Ascent. Forester. With turbo. Impreza. 2.0L, with hybrid. More Info
Notes: Included with thermostat. Part cannot be reused/reinstalled. More Notes
MSRP $4.05
$2.87
MSRP $4.05
$2.87
Thermostat Cover
Part Number: 11060AA190
Other Names: Thermostat Housing, Cover Thermo More Names
Description: 3.6L. Legacy/Outback. 2008-14. Tribeca. More Info
MSRP $21.62
$15.30
MSRP $21.62
$15.30
Thermostat Housing
Part Number: 11060AA220
Other Names: Water Inlet, Cover Thermo More Names
Description: Legacy. With turbo. More Info
MSRP $34.70
$24.57
MSRP $34.70
$24.57
Thermostat Unit
Part Number: 21200AA230
Other Names: Thermostat Assembly More Names
Description: 2.5L with turbo. More Info
Notes: Included with thermostat. More Notes
MSRP $22.28
$15.78
MSRP $22.28
$15.78
PT500289 Thermostat
Part Number: 21200KA050
Other Names: PT500289 Thermostat More Names
Replaces: 417535500
Description: All models. Justy. Without fuel injection. More Info
MSRP $22.28
$15.78
MSRP $22.28
$15.78
Thermostat Housing
Part Number: 417547100
Other Names: Cover Thermo More Names
Description: Hatchback. All models. Brat. More Info
MSRP $18.97
$13.43
MSRP $18.97
$13.43
Thermostat Cooling
Part Number: 73540FG011
Other Names: Refrigerant Temp Sensor, Thms Thermo Ay More Names
Replaces: 73540FG010
Description: With climate control. Automatic. WRX, WRX STI. Auto control. Impreza. More Info
Notes: Included with AC & heater assembly. More Notes
MSRP $47.87
$33.89
MSRP $47.87
$33.89
Thermostat Cooling
Part Number: 73540FJ000
Other Names: HVAC Evaporator Temperature Switch, Thms Thermo Ay More Names
Replaces: 73540FG000, 73540FG001
Description: Without climate control. Manual control. Exc.Automatic Temperature Controls. More Info
Notes: Included with AC & heater assembly. More Notes
MSRP $47.87
$33.89
MSRP $47.87
$33.89
Engine Coolant Thermostat
Part Number: 21200AA072
Other Names: Thermostat More Names
Replaces: 21200AA070, 21200AA071
Notes: Included with repair kit. Included with thermostat unit. More Notes
MSRP $29.17
$20.65
MSRP $29.17
$20.65
Thermostat And Gasket Ay
Part Number: 21210AA221
Options: Front
Other Names: Thermostat And Gasket Ay More Names
Replaces: 21210AA220
Description: WRX. 2.0L. Front. Ascent. Forester. With turbo. More Info
Notes: Includes Gasket. Part has related components that cannot be reused/reinstalled. gasket. More Notes
MSRP $30.40
$21.52
MSRP $30.40
$21.52
Engine Coolant Thermostat
Part Number: 21210AA211
Other Names: Thermostat, Thermostat And Gasket Ay More Names
Replaces: 21210AA210
Description: Impreza. Legacy. Without turbo. Outback. XV Crosstrek, Crosstrek. Engine Cooling. Incl.Gasket. More Info
Notes: Includes Gasket. More Notes
MSRP $41.25
$29.21
MSRP $41.25
$29.21
Thermostat Housing Bolt
Part Number: 21177AA000
Other Names: Engine Coolant Thermostat Housing Bolt, Bolt More Names
Description: 2.5L, 2005. More Info
MSRP $0.80
$0.47
MSRP $0.80
$0.47
Engine Coolant Thermostat
Part Number: 21200AA121
Other Names: Thermostat More Names
Replaces: 21200AA050, 21200AA060, 21200AA100, 21200AA120, 317534302, 417537000, 417537300
Description: All models. XT, sedan, coupe, wagon,hatchback. Loyale. Brat. XT coupe. 1.8l. More Info
MSRP $22.28
$15.78
MSRP $22.28
$15.78
Engine Coolant Thermostat
Part Number: 21200AA170
Other Names: Thermostat, Thermostat Cover Bolt, Thermostat Assembly More Names
Description: Thermostat. Impreza. Forester. 2.5L, 2006-07. More Info
Notes: Included with thermostat unit. More Notes
MSRP $22.28
$15.78
MSRP $22.28
$15.78
Thermostat Unit
Part Number: 21210AA030
Other Names: Thermostat, Repair Kit, Thermostat And Gasket Ay More Names
Description: 3.6L. Legacy, Outback. Forester. 2.5L, 2005. 2.0L, with gasket. More Info
MSRP $32.08
$22.72
MSRP $32.08
$22.72
Thermostat And Gasket Ay
Part Number: 21210AA181
Options: Lower
Other Names: Thermostat And Gasket Ay More Names
Replaces: 21210AA180
Description: Forester. BRZ. No.2 (at water pump). Lower. 2.5L without turbo, 2011-13. More Info
Notes: Includes Gasket. More Notes
MSRP $30.40
$21.52
MSRP $30.40
$21.52
Engine Coolant Thermostat
Part Number: 21210AA190
Options: Upper, Rear
Other Names: Thermostat, Coolant Temp Sensor, Temp Sensor, Thermostat And Gasket Ay More Names
Description: Transmission Cooling. Incl.Gasket. BRZ. Upper, auto trans only. Rear. Impreza. 2.0L, without hybrid, auto trans only. XV Crosstrek. More Info
Notes: Includes Gasket. Included with water pipe. More Notes
MSRP $35.75
$25.31
MSRP $35.75
$25.31
Engine Coolant Thermostat Housing
Part Number: 11060AA260
Options: Lower
Other Names: Thermostat Housing, Water Inlet, Thermostat Cover, Outlet Tube, Cover Thermo More Names
MSRP $24.65
$17.45
MSRP $24.65
$17.45
Engine Coolant Thermostat Housing
Part Number: 11060AA380
Other Names: Cover Thermo More Names
Description: Transmission Cooling. More Info
MSRP $18.23
$12.91
MSRP $18.23
$12.91
Engine Coolant Thermostat Gasket
Part Number: 11072KA000
Other Names: Thermo Cover Gasket More Names
Replaces: 317551900
MSRP $8.43
$5.97
MSRP $8.43
$5.97
Engine Coolant Thermostat Gasket
Part Number: 21236AA100
Options: Rear
Other Names: Thermostat O-Ring, Thermostat Gasket, Gasket, Thermostat Seal, Temp Sensor O-Ring, Gasket Thermo More Names
Description: Transmission Cooling. Rear. Impreza. 2.0L, without hybrid. More Info
Notes: Included with thermostat. Included with temp sensor. More Notes
MSRP $4.05
$2.87
MSRP $4.05
$2.87
Thermostat Housing
Part Number: 11060AA320
Other Names: Cover, Cover Thermo More Names
Description: BRZ. Manual trans only. More Info
MSRP $7.67
$5.43
MSRP $7.67
$5.43
Engine Coolant Thermostat Gasket
Part Number: 21236AA090
Other Names: Gasket Thermo More Names
Description: Transmission Cooling. More Info
MSRP $7.57
$5.36
MSRP $7.57
$5.36
Engine Coolant Thermostat Housing
Part Number: 11060AA102
Other Names: Thermostat Cover, Thermostat Housing, Cover Thermo More Names
Description: Outback. 3.0l. More Info
MSRP $29.82
$21.11
MSRP $29.82
$21.11
Engine Coolant Thermostat Housing
Part Number: 11060AA270
Other Names: Thermostat Housing, Water Inlet, Cover Thermo More Names
Description: Transmission Cooling. Legacy, Outback. Impreza. XV Crosstrek. Without hybrid. More Info
MSRP $18.23
$12.91
MSRP $18.23
$12.91
Engine Coolant Thermostat Gasket
Part Number: 11072AA030
Other Names: Thermo Cover Gasket More Names
Replaces: 11072AA000, 11072AA020, 817554100, 817554110, 817554120
MSRP $3.55
$2.51
MSRP $3.55
$2.51
Engine Coolant Thermostat Housing Bolt
Part Number: 01040625A
Other Names: Thermostat Cover Bolt, Thermostat Bolt, Thermostat Housing Bolt, Cooling Pipe Bolt, Water Manifold Bolt, Water Pump Bolt, Water... More Names
Description: 3.6L. 2.5L, 2006-07. 2.5L, 2002-05. Without turbo. 2.0L. More Info
Notes: Included with water pipe. More Notes
MSRP $0.82
$0.48
MSRP $0.82
$0.48
Engine Coolant Thermostat Housing Bolt
Part Number: 808206040
Other Names: Thermostat Housing Bolt, Water Pump Bolt, Water Pipe Bolt, Water Manifold Bolt, Thermostat Cover Bolt, Engine Coolant Pipe Bolt,... More Names
Description: 2.5L. 3.6L. 2.0L, with hybrid. More Info
Notes: Included with water pipe. More Notes
MSRP $1.75
$1.24
MSRP $1.75
$1.24
HVAC Evaporator Temperature Switch
Part Number: 73071AA030
Other Names: Thermostat Control More Names
MSRP $80.78
$57.19
MSRP $80.78
$57.19
Thermistor
Part Number: 73540SA020
Other Names: Thermostat Cooling More Names
Description: Manual control, from 2-1-05. More Info
Notes: Included with evaporator assembly. More Notes
MSRP $99.42
$70.39
MSRP $99.42
$70.39
HVAC Evaporator Temperature Switch
Part Number: 73540FL500
Other Names: Thermostat Ay Cooling More Names
MSRP $49.65
$35.15
MSRP $49.65
$35.15
Water Inlet
Part Number: 11060AA300
Options: Front, Lower
Other Names: Water Outlet, Thermostat Housing, Thermostat Cover, Cover Thermo More Names
Description: WRX. Impreza. Front. Crosstrek. Ascent. Forester. With turbo. 2.0L, with hybrid. 2.5L, lower. More Info
MSRP $34.70
$24.57
MSRP $34.70
$24.57

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Maintaining Your Car’s Thermostat

A thermostat is a component that sits between the engine and the radiator. Its primary function is to regulate engine temperature. 

A thermostat works by opening and closing to control coolant flow depending on the engine’s temperature. When the engine is cold, a thermostat stays closed. But when the engine coolant rises in temperature—typically around 180 F/82 C—the thermostat opens, allowing the coolant to pass through the radiator.

A thermostat opens or closes depending on the state of the coolant. Having to adapt to changes in temperature could damage it, however. This could result in major engine damage if left unchecked.

There are several signs to watch out for to see if your thermostat is no longer functioning properly. If the temperature gauge has reached abnormal levels and the engine is overheating, for instance, it could be a sign that your thermostat needs replacement. On the flipside, if your car fails to heat up properly, there’s a possibility that the thermostat is stuck in its open position. 

Buy a Genuine OEM Thermostat for your Subaru Today

At SubaruOnlineParts, we offer genuine OEM thermostats for select Subaru models and model years. Our thermostats guarantee proper fitment and include a 12-month minimum manufacturer guarantee. For any questions about our products, don’t hesitate to reach out. Shop with us today.