How to Remove and Replace a Radiator and Coolant Reservoir on a Subaru Legacy?

Set the parking brake, raise the vehicle, and support it on jackstands. Remove the splash shield, drain the cooling system, and remove the air intake duct and coolant reservoir. Remove the heat-shield and lower radiator cover on turbo models. Disconnect the radiator hoses, fluid cooler lines, and fan electrical connectors. Remove the radiator mounting brackets and any attached clips or hoses. Lift out the radiator and cooling fans, inspect for leaks and damage. Remove the coolant reservoir and top engine cover. Fill the cooling system with coolant, start the engine, and check for leaks. Recheck coolant level and add transaxle fluid as needed. Tighten the radiator bracket bolts, guide the radiator into the mounts, and fill the cooling system. Check the radiator mounts for deterioration and clean the radiator. Flush the radiator before reinstallation, and reinstall in reverse order. Fill the cooling system with coolant.

Genuine Subaru Legacy Coolant Reservoir

Coolant Tank Reservoir

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15 Coolant Reservoirs found

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Subaru Legacy Tank Reserve Assembly
Part Number: 45150AN00A
$16.88 MSRP: $23.45
You Save: $6.57 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.4R F/R-O, 2.4R Limited, 2.4R Touring, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.4L H4 DIT, 2.5L H4 DI
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Subaru Legacy Tank Reserve
Part Number: 45150AE01A
$25.31 MSRP: $35.15
You Save: $9.84 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir Assembly
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2001-2004 Subaru Legacy | Flat6, Flat6 L.L.Bean, Flat6-S, SUS Flat6 | 3.0L H6
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Subaru Legacy Tank Reserve
Part Number: 45150AG00A
$50.70 MSRP: $70.42
You Save: $19.72 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir, Reservoir Assembly
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2019 Subaru Legacy | 2.5GT Limited, 2.5GT Premium, 2.5i, 2.5i Base, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring, 3.0R, 3.0R Limited, 3.0R LL-Bean, 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring, Base | 2.5L H4, 2.5L H4 DOHC, 2.5L H4 SOHC, 2.5L H4 Turbo, 3.0L H6, 3.6L H6
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Subaru Legacy Tank Reserve
Part Number: 45150AE00A
$50.66 MSRP: $70.37
You Save: $19.71 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir Assembly
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2000-2004 Subaru Legacy | Baja, Baja-S, Base, Brighton, Cold Weather, GT, L, Limited, L-S, SUS Limited | 2.5L H4
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Subaru Legacy Tank Assembly Water
Part Number: 21132AA121
$82.49 MSRP: $114.57
You Save: $32.08 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tank Assembly-Water; Tank
- Replaces: 21132AA120
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2009 Subaru Legacy | GT, GT Limited, XT Limited | 2.5L H4 Turbo
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Subaru Legacy Reserve Tank Assembly Radiator
Part Number: 45150FE000
$57.01 MSRP: $79.18
You Save: $22.17 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir Assembly
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004 Subaru Legacy | Baja-B | 2.5L H4 Turbo
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Subaru Legacy Tank Assembly Water
Part Number: 21132AA120
$82.49 MSRP: $114.57
You Save: $32.08 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank Assembly-Water
- Replaced by: 21132AA121
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2009 Subaru Legacy | GT, GT Limited, XT Limited | 2.5L H4 Turbo
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Subaru Legacy Tank Assembly Water
Part Number: 21132AA075
$119.89 MSRP: $166.52
You Save: $46.63 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank Assembly-Water
- Replaced by: 21132AA131
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004 Subaru Legacy | Baja-B | 2.5L H4 Turbo
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Subaru Legacy Water Tank Assembly
Part Number: 21132AA010
$120.67 MSRP: $167.60
You Save: $46.93 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tank Assembly-Water
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1991-1994 Subaru Legacy | Turbo
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Subaru Legacy Tank Reserve
Part Number: 45150AG01A
$50.81 MSRP: $70.57
You Save: $19.76 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir Assembly
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2009 Subaru Legacy | GT, GT Limited, XT Limited | 2.5L H4 Turbo
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Subaru Legacy Reserve Tank Assembly
Part Number: 45151AC000
$51.83 MSRP: $71.98
You Save: $20.15 (28%)
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir Assembly
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1995-1999 Subaru Legacy | Base, Brighton, GT, L, LS, LS-I, Out Back, Post, SUS | 2.2L H4 , 2.2L H4 (New EVAPO), 2.2L H4 Series, 2.5L H4
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Subaru Legacy Reserve Tank Assembly
Part Number: 45151AA060
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator
- Replaced by: 45151AA001
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1992-1994 Subaru Legacy | L, LS
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Subaru Legacy Reserve Tank Assembly
Part Number: 45151AA040
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1991-1994 Subaru Legacy | Turbo
View related parts
Subaru Legacy Reserve Tank Assembly
Part Number: 45151AA000
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator
- Replaced by: 45151AA001
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1990 Subaru Legacy | Base, L, LS, LS-D
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Subaru Legacy PT030292 Reserve Tank Assembly
Part Number: 45151AA001
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Reservoir
- Replaces: 45151AA000, 45151AA060
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1990-1994 Subaru Legacy | Base, L, LS, LS-D

Subaru Legacy Coolant Reservoir

Coolant Reservoir can be classified as a part nevertheless, in Subaru Legacy vehicles, it plays an important role of holding coolant and preventing it from spilling throughout the engine cooling system, it also has an important function of making sure there is no air in the coolant. There are two main types of Coolant Reservoirs used in Legacy vehicles: These systems encompass what is commonly referred to as the overflow tank systems as well as the expansion tank systems. Overflow is situated with a pressure cap on the radiators and the expansion system has the cap placed on the actual tank. Inspection is advised on a regular basis to observe presence of crack, leaks and excessive deterioration arising as a result of age and heat cycling. Thus, such Coolant Reservoir has the exceptionally important functions of stabilizing the working volume of the coolant and preventing the detrimental effects of leaks in the external environment through the utilization of antifreeze.

Our website stands as the go-to online destination for OEM Subaru Legacy Coolant Reservoir. With complete lines of genuine Subaru Legacy Coolant Reservoir 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 Legacy Coolant Reservoir Parts Questions & Experts Answers

Tank Assembly Water
21132AA075
Q: How to Remove and Replace a Radiator and Coolant Reservoir on a Subaru Legacy?
A: Set the parking brake, raise the vehicle, and support it on jackstands. Remove the splash shield, drain the cooling system, and remove the air intake duct and coolant reservoir. Remove the heat-shield and lower radiator cover on turbo models. Disconnect the radiator hoses, fluid cooler lines, and fan electrical connectors. Remove the radiator mounting brackets and any attached clips or hoses. Lift out the radiator and cooling fans, inspect for leaks and damage. Remove the coolant reservoir and top engine cover. Fill the cooling system with coolant, start the engine, and check for leaks. Recheck coolant level and add transaxle fluid as needed. Tighten the radiator bracket bolts, guide the radiator into the mounts, and fill the cooling system. Check the radiator mounts for deterioration and clean the radiator. Flush the radiator before reinstallation, and reinstall in reverse order. Fill the cooling system with coolant.