What Are the Signs of Water Pump Failure on Subaru Legacy?

Water pump failure, causing engine damage due to overheating, is indicated by coolant leakage and a howling sound. This shouldn't be confused with drivebelt slippage, which squeals. The pump is at the engine's front, and a coolant puddle under the vehicle likely means a failed pump seal. Noise from the pump suggests a worn impeller shaft bearing, possibly confirmed by wiggling the drive pulley.

How to Replace a Water Pump on Subaru Legacy?

To remove the water pump, drain the cooling system, disconnect the radiator, and bypass hose. Remove the cooling fans, drivebelt cover, drive belts, timing belt, tensioner, idler pulley, and left camshaft sprocket. Remove the rear timing belt cover, tensioner bracket, and camshaft sensor. Loosen the water pump bolts, remove the pump and gasket, and clean the engine surface. Compare the new and old pumps, apply sealant to the new gasket and pump, and install. Apply RTV sealant to bolt threads, position the pump and gasket, and tighten bolts.

Genuine Subaru Legacy Water Pump

H2O Pump

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18 Water Pumps found

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Subaru Legacy Water Pump Assembly
Part Number: 21110AA690
$156.31 MSRP: $218.92
You Save: $62.61 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013-2019 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4, 2.5L H4 DOHC
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Subaru Legacy Water Pump Complete
Part Number: 21111AA240
$117.79 MSRP: $163.60
You Save: $45.81 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump
- Manufacturer Note: OIL COOLER O
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2009 Subaru Legacy | Baja-B, GT, GT Limited, XT Limited | 2.5L H4 Turbo
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Subaru Legacy Water Pump Complete
Part Number: 21111AA280
$138.26 MSRP: $192.03
You Save: $53.77 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2009 Subaru Legacy | 2.5i, 2.5i Base, 2.5i Limited, Base | 2.5L H4
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Subaru Legacy Water Pump Assembly
Part Number: 21110AA360
$129.06 MSRP: $179.25
You Save: $50.19 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Water Pump
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2001-2009 Subaru Legacy | 3.0R, 3.0R Limited, 3.0R LL-Bean, Flat6, Flat6 L.L.Bean, Flat6-S, SUS Flat6 | 3.0L H6
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Subaru Legacy Water Pump Complete
Part Number: 21111AA320
$117.54 MSRP: $163.25
You Save: $45.71 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2012 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium | 2.5L H4 SOHC
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Subaru Legacy Water Pump Assembly
Part Number: 21110AA510
$161.58 MSRP: $226.30
You Save: $64.72 (29%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Water Pump
- Replaced by: 21110AA511
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2019 Subaru Legacy | 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 3.6L H6
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Subaru Legacy Water Pump
Part Number: 21111AA110
$111.78 MSRP: $155.25
You Save: $43.47 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Water Pump Complete
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1997-2005 Subaru Legacy | 2.5i, 2.5i Limited, Baja, Baja-S, Base, Brighton, Cold Weather, GT, L, Limited, LS, L-S, LS-I, Out Back, Post, SUS, SUS Limited | 2.2L H4 , 2.2L H4 (New EVAPO), 2.2L H4 Series, 2.5L H4
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Subaru Legacy Water Pump Complete
Part Number: 21111AA380
$137.33 MSRP: $190.73
You Save: $53.40 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Water Pump
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2012 Subaru Legacy | 2.5GT Limited, 2.5GT Premium | 2.5L H4 Turbo
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Subaru Legacy Water Pump
Part Number: 21111AA003
$87.24 MSRP: $121.17
You Save: $33.93 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA007
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1996-1997 Subaru Legacy | Brighton, GT, L, LS, LS-I, Out Back, Post, SUS | 2.2L H4 , 2.2L H4 (New EVAPO), 2.5L H4
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Subaru Legacy Water Pump
Part Number: 21111AA002
$87.24 MSRP: $121.17
You Save: $33.93 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA007
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1992-1996 Subaru Legacy | Base, Brighton, GT, L, LS, LS-I, Out Back, Post | 2.2L H4 , 2.2L H4 (New EVAPO), 2.5L H4
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Subaru Legacy Water Pump
Part Number: 21111AA004
$87.24 MSRP: $121.17
You Save: $33.93 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA007
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1997 Subaru Legacy | Brighton, GT, L, LS, LS-I, Out Back, Post, SUS | 2.2L H4 , 2.2L H4 (New EVAPO), 2.5L H4
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Subaru Legacy Water Pump
Part Number: 21111AA021
$133.20 MSRP: $185.00
You Save: $51.80 (28%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA026
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1991 Subaru Legacy | Turbo
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Subaru Legacy Water Pump
Part Number: 21111AA000
$87.24 MSRP: $121.17
You Save: $33.93 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA007
- 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 Water Pump
Part Number: 21111AA001
$87.24 MSRP: $121.17
You Save: $33.93 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA007
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1990-1992 Subaru Legacy | Base, L, LS, LS-D
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Subaru Legacy Water Pump
Part Number: 21111AA005
$87.24 MSRP: $121.17
You Save: $33.93 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA007
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1997 Subaru Legacy | Brighton, GT, L, LS, LS-I, Out Back, Post, SUS | 2.2L H4 , 2.2L H4 (New EVAPO), 2.5L H4
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Subaru Legacy Water Pump
Part Number: 21111AA060
$119.60 MSRP: $166.12
You Save: $46.52 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA065
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1992 Subaru Legacy | Turbo
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Subaru Legacy Water Pump
Part Number: 21111AA061
$119.60 MSRP: $166.12
You Save: $46.52 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Water Pump Complete
- Replaced by: 21111AA065
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1992-1994 Subaru Legacy | Turbo
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Subaru Legacy Pump Assembly Water
Part Number: 21110AA770
$121.51 MSRP: $168.77
You Save: $47.26 (28%)
ADD TO CART
Product Specifications
- Other Name: Pump Ay Water
- 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

Subaru Legacy Water Pump

They are the Water Pump in Subaru Legacy vehicles which pumps anti-freeze solutions in the engine block with a view of cooling system in the radiator that absorbs heat produced through the burning fuel. On the majority of cars belonging to Legacy models, a belt-driven water pump with an impeller is installed to circulate the coolant through the engine block and further to the radiator. Whereas in the earlier models of water pumps, there was the use of cast iron water pumps today's models use aluminum castings which are more efficient. Some signs are lube leaks, squealing from the bearings, and, finally, high temperatures coming out from the engine. High-performance stimuli include revised water pumps with neater impellers and interconnection system to pump more coolant whereas high-revving engines lose little power to the water pump. However, it is also possible to use electric water pumps and get improved efficiency and cooling in the custom applications where is not so much space.

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

Water Pump Complete
21111AA240
Q: What Are the Signs of Water Pump Failure on Subaru Legacy?
A: Water pump failure, causing engine damage due to overheating, is indicated by coolant leakage and a howling sound. This shouldn't be confused with drivebelt slippage, which squeals. The pump is at the engine's front, and a coolant puddle under the vehicle likely means a failed pump seal. Noise from the pump suggests a worn impeller shaft bearing, possibly confirmed by wiggling the drive pulley.
Water Pump Assembly
21110AA360
Q: How to Replace a Water Pump on Subaru Legacy?
A: To remove the water pump, drain the cooling system, disconnect the radiator, and bypass hose. Remove the cooling fans, drivebelt cover, drive belts, timing belt, tensioner, idler pulley, and left camshaft sprocket. Remove the rear timing belt cover, tensioner bracket, and camshaft sensor. Loosen the water pump bolts, remove the pump and gasket, and clean the engine surface. Compare the new and old pumps, apply sealant to the new gasket and pump, and install. Apply RTV sealant to bolt threads, position the pump and gasket, and tighten bolts.