Where is the Thermostat Located and How to Replace It on Subaru Forester?

The thermostat controls the engine's temperature. If working correctly, the temperature gauge should quickly reach the normal temperature. To replace, begin by lifting the vehicle's front, draining the cooling system, and placing a drain pan under the thermostat housing. Remove the housing cover. Note the thermostat's position then remove it. Clean the thermostat housing and cover and install a new seal. Place the thermostat correctly then position the housing cover correctly and screw the bolts. Reattach the radiator hose and fill the radiator up with coolant, then start the engine. Check for leaks.

Genuine Subaru Forester Thermostat

Engine Coolant Thermostat

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

21 Thermostats found

View related parts
Subaru Forester THERMOSTAT Gasket Assembly
Part Number: 21210AA030
$19.67 MSRP: $28.50
You Save: $8.83 (31%)
ADD TO CART
Product Specifications
- Other Name: Thermo And Gasket Assembly; Repair Kit, Thermostat, Thermostat Unit
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2003-2013 Subaru Forester | Forester Sports, L.L.Bean, X, XS, XT, XT Limited | 2.5L H4, 2.5L H4 DOHC Turbo, 2.5L H4 Turbo
View related parts
Subaru Forester THERMOSTAT
Part Number: 21200AA072
$22.60 MSRP: $32.75
You Save: $10.15 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermo Assembly
- Replaces: 21200AA071, 21200AA070
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1998-2013 Subaru Forester | Base, Forester Sports, L, L.L.Bean, S, X, XS, XT, XT Limited | 2.5L H4, 2.5L H4 DOHC, 2.5L H4 DOHC (New EVAPO), 2.5L H4 DOHC Turbo, 2.5L H4 SOHC, 2.5L H4 Turbo
View related parts
Subaru Forester THERMOSTAT Gasket Assembly
Part Number: 21210AA080
$18.40 MSRP: $26.67
You Save: $8.27 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermo And Gasket Assembly; Thermostat, Thermostat Unit
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2010 Subaru Forester | Forester Sports, L.L.Bean, X, X Limited, XS | 2.5L H4, 2.5L H4 SOHC
View related parts
Subaru Forester THERMO & Gasket Assembly
Part Number: 21210AA181
$25.01 MSRP: $36.25
You Save: $11.24 (32%)
ADD TO CART
Product Specifications
- Other Name: Thermo And Gasket Assembly; Thermostat
- Replaces: 21210AA180
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011-2018 Subaru Forester | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring, X, X Limited, X Premium | 2.5L H4, 2.5L H4 DOHC
View related parts
Subaru Forester THERMOSTAT Gasket Assembly
Part Number: 21210AA190
$23.12 MSRP: $33.50
You Save: $10.38 (31%)
ADD TO CART
Product Specifications
- Other Name: Thermo And Gasket Assembly; Thermostat
- Replaced by: 21210AA191
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2014-2018 Subaru Forester | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.5L H4
View related parts
Subaru Forester THERMO And Gasket Assembly
Part Number: 21210AA221
$27.21 MSRP: $39.43
You Save: $12.22 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat
- Replaces: 21210AA220
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2025 Subaru Forester | 4 Cyl 2.5L, 4 Cyl 2.5L Hybrid
- 2014-2018 Subaru Forester | 2.0XT Premium, 2.0XT Touring | 2.0L H4
View related parts
Subaru Forester THMS THERMO Assembly
Part Number: 73540FG011
$39.79 MSRP: $57.67
You Save: $17.88 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat-Cooling; Refrigerant Temp Sensor, Temp Sensor
- Replaces: 73540FG010
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2009-2018 Subaru Forester | 2.0XT Premium, 2.0XT Touring, 2.5i Limited, 2.5i Premium, 2.5i Touring, X Limited, XT Limited | 2.0L H4, 2.5L H4, 2.5L H4 DOHC, 2.5L H4 DOHC Turbo, 2.5L H4 SOHC
View related parts
Subaru Forester THERMOSTAT Gasket Assembly
Part Number: 21210AA180
$25.01 MSRP: $36.25
You Save: $11.24 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermo And Gasket Assembly
- Replaced by: 21210AA181
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011-2014 Subaru Forester | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring, X, X Limited, X Premium | 2.5L H4, 2.5L H4 DOHC
View related parts
Subaru Forester THERMOSTAT Assembly
Part Number: 21200AA170
$17.25 MSRP: $25.00
You Save: $7.75 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermo Assembly; Thermostat, Thermostat Cover Bolt
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2010 Subaru Forester | Forester Sports, L.L.Bean, X, X Limited, XS | 2.5L H4, 2.5L H4 SOHC
View related parts
Subaru Forester THERMOSTAT Cooling
Part Number: 73540FG000
$41.80 MSRP: $60.58
You Save: $18.78 (31%)
ADD TO CART
Product Specifications
- Other Name: Thermostat-Cooling
- Manufacturer Note: ZXL/582552-1720
- Replaced by: 73540FJ000
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2009-2011 Subaru Forester | X, X Premium, XS, XT | 2.5L H4 DOHC, 2.5L H4 DOHC Turbo, 2.5L H4 SOHC
View related parts
Subaru Forester A/C Evaporator Temperature Sensor
Part Number: 73540FJ000
$41.80 MSRP: $60.58
You Save: $18.78 (31%)
ADD TO CART
Product Specifications
- Other Name: HVAC Evaporator Temperature Switch; Temp Sensor
- Replaces: 73540FG001, 73540FG000
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2009-2018 Subaru Forester | 2.0XT Premium, 2.5i, 2.5i Premium, X, X Premium, XS, XT | 2.0L H4, 2.5L H4, 2.5L H4 DOHC, 2.5L H4 DOHC Turbo, 2.5L H4 SOHC
View related parts
Subaru Forester THERMOSTAT Cooling
Part Number: 73540FG010
$39.79 MSRP: $57.67
You Save: $17.88 (31%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Thermostat-Cooling
- Manufacturer Note: ZXL/582624-6520
- Replaced by: 73540FG011
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2009-2011 Subaru Forester | X Limited, XT Limited | 2.5L H4 DOHC, 2.5L H4 DOHC Turbo, 2.5L H4 SOHC
View related parts
Subaru Forester THERMO & GSKT AY
Part Number: 21210AA291
$27.21 MSRP: $39.43
You Save: $12.22 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 21210AA290
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2022-2025 Subaru Forester | 4 Cyl 2.5L
View related parts
Subaru Forester THERMO & GSKT Ay
Part Number: 21210AA290
$27.21 MSRP: $39.43
You Save: $12.22 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: 21210AA291
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2019-2021 Subaru Forester | Base, Limited, Premium, Sport, Touring
View related parts
Subaru Forester THERMISTOR THERMO Ay
Part Number: 73540FL000
$39.79 MSRP: $57.67
You Save: $17.88 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2019-2021 Subaru Forester | Base, Limited, Premium, Sport, Touring
View related parts
Subaru Forester THERMISTOR THERMO Ay
Part Number: 73540FL010
$40.40 MSRP: $58.55
You Save: $18.15 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2019-2021 Subaru Forester | Base, Limited, Premium, Sport, Touring
View related parts
Subaru Forester THERMOSTAT Gasket Assembly
Part Number: 21210AA220
$27.21 MSRP: $39.43
You Save: $12.22 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermo And Gasket Assembly
- Replaced by: 21210AA221
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2014 Subaru Forester | 2.0XT Premium, 2.0XT Touring | 2.0L H4
View related parts
Subaru Forester THMS THERMO Ay
Part Number: 73540FL640
$39.33 MSRP: $57.00
You Save: $17.67 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2025 Subaru Forester | 4 Cyl 2.5L, 4 Cyl 2.5L Hybrid
View related parts
Subaru Forester THMS THERMO Assembly
Part Number: 73540FG001
$41.80 MSRP: $60.58
You Save: $18.78 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat-Cooling
- Replaced by: 73540FJ000
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011-2012 Subaru Forester | X, X Premium, XT | 2.5L H4 DOHC, 2.5L H4 DOHC Turbo
View related parts
Subaru Forester THERMO Assembly
Part Number: 73540SA000
Product Specifications
- Other Name: Thermostat-Cooling; Thermistor
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2003-2006 Subaru Forester | X, XS | 2.5L H4

| Page 1 of 2 |Next >

1-20 of 21 Results

Subaru Forester Thermostat

Subaru Forester Thermostat is without doubt the crucial element of the cooling system of a vehicle and it is aimed to adjust the temperature of the engine for purposeful performances. This genuine Subaru Forester Thermostat has earned its reputation for being dependable because it regulates the appropriate temperature for the engine to perform safely and effectively. This kind of Thermostat functions by regulating the circulation of the coolant so that the can adjust to the prevailing temperatures while on the road. Applicable for several Forester generations, the Thermostat has been updated with enhancements that enhance the device's performance and reliability. However, the notable part is that the mechanical designs which are applied in the Thermostat include the bimetallic strips and tube containing wax pellets which on expansion or contraction regulate the engine temperatures. This development in the Thermostat Advanced goes further than bringing in efficiency in vehicles, but it also awakens the comfort degree of the driver. The compact Subaru Forester with a powerful engine, excellent safety features has been praised since its 1995 release, ensuring its popularity in the classification of SUVs. As part of the Subaru Forester kind, the great intelligence of the external design in conjunction with the constructive quality of its parts makes this Subaru Forester Thermostat an integral component that guarantees the prime performance and durability of the automobile to drivers, thus allowing them to fully appreciate their Subaru Forester to its full extent and for a very long time.

Our website stands as the go-to online destination for OEM Subaru Forester Thermostat. With complete lines of genuine Subaru Forester Thermostat available at unbeatable market prices, we ensure top quality, reliability, and durability. Each part comes backed by the manufacturer's warranty, reinforcing your trust in our offerings.

Subaru Forester Thermostat Parts Questions & Experts Answers

THERMOSTAT Gasket Assembly
21210AA080
Q: Where is the Thermostat Located and How to Replace It on Subaru Forester?
A:
The thermostat controls the engine's temperature. If working correctly, the temperature gauge should quickly reach the normal temperature. To replace, begin by lifting the vehicle's front, draining the cooling system, and placing a drain pan under the thermostat housing. Remove the housing cover. Note the thermostat's position then remove it. Clean the thermostat housing and cover and install a new seal. Place the thermostat correctly then position the housing cover correctly and screw the bolts. Reattach the radiator hose and fill the radiator up with coolant, then start the engine. Check for leaks.