How to Replace a Water Pump on Subaru Legacy?

Except for Forester 2002 and older, you need to drain your cooling system, detach both radiator hose and bypass line from the pump, then detach both cooling radiator fans. You'll first remove the drive belt cover and then take the belts out of place. On engines without a turbo, first you need to take out the tensioner and idler pulley under the water pump, then two parts of the timing belt assembly from the left camshaft, and finally remove the cover from the back of the engine where timing belt runs. For cars with turbo engines, take off these three parts from both sides of the water pump: the timing belt tensioner and idler pulleys sitting just above and below pump, and the camshaft position sensor. You should remove all bolts from the water pump, get the pump and old gasket apart from the engine, and completely take off any residue from the old gasket while cleaning the surfaces. Make sure the replacement pump matches what you took off, put sealant on both sides of a fresh gasket, and place it on the pump. Spread RTV sealant on the threads of each mounting bolt, place the water pump gently, making sure it sits correctly with the gasket, then screw in the bolts without over-tightening. Start with the middle bolt on the right side of the bolts, tighten them clockwise, check the torque rate after, and complete all bolts following this pattern. To finish installing the water pump, you follow the same steps in reverse order: put back all the parts you took out for access, attach the hoses to the pump, use firm grip to turn your hose clamps tightly, top up your cooling system, and make sure your drivebelt is set correctly.

Genuine Subaru Legacy Water Pump

H2O Pump

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).

18 Water Pumps found

View related parts
Subaru Legacy Water Pump Assembly
Part Number: 21110AA690
$149.74 MSRP: $218.92
You Save: $69.18 (32%)
Ships in 1-3 Business Days
ADD TO CART
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
View related parts
Subaru Legacy Water Pump Complete
Part Number: 21111AA240
$112.88 MSRP: $163.60
You Save: $50.72 (31%)
Ships in 1-3 Business Days
ADD TO CART
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
View related parts
Subaru Legacy Water Pump Complete
Part Number: 21111AA280
$132.50 MSRP: $192.03
You Save: $59.53 (31%)
Ships in 1-3 Business Days
ADD TO CART
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
View related parts
Subaru Legacy Water Pump Assembly
Part Number: 21110AA360
$123.68 MSRP: $179.25
You Save: $55.57 (31%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
Subaru Legacy Water Pump Complete
Part Number: 21111AA320
$112.64 MSRP: $163.25
You Save: $50.61 (31%)
Ships in 1-3 Business Days
ADD TO CART
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
View related parts
Subaru Legacy Water Pump Assembly
Part Number: 21110AA510
$154.79 MSRP: $226.30
You Save: $71.51 (32%)
Ships in 1 Business Day
ADD TO CART
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA110
$107.12 MSRP: $155.25
You Save: $48.13 (31%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
Subaru Legacy Water Pump Complete
Part Number: 21111AA380
$131.61 MSRP: $190.73
You Save: $59.12 (31%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA003
$83.61 MSRP: $121.17
You Save: $37.56 (31%)
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:
- 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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA002
$83.61 MSRP: $121.17
You Save: $37.56 (31%)
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:
- 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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA004
$83.61 MSRP: $121.17
You Save: $37.56 (31%)
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA021
$127.65 MSRP: $185.00
You Save: $57.35 (31%)
Ships in 1 Business Day
ADD TO CART
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA000
$83.61 MSRP: $121.17
You Save: $37.56 (31%)
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA001
$83.61 MSRP: $121.17
You Save: $37.56 (31%)
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA005
$83.61 MSRP: $121.17
You Save: $37.56 (31%)
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA060
$114.62 MSRP: $166.12
You Save: $51.50 (31%)
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
View related parts
Subaru Legacy Water Pump
Part Number: 21111AA061
$114.62 MSRP: $166.12
You Save: $51.50 (31%)
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
View related parts
Subaru Legacy Pump Assembly Water
Part Number: 21110AA770
$116.45 MSRP: $168.77
You Save: $52.32 (31%)
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: How to Replace a Water Pump on Subaru Legacy?
A: Except for Forester 2002 and older, you need to drain your cooling system, detach both radiator hose and bypass line from the pump, then detach both cooling radiator fans. You'll first remove the drive belt cover and then take the belts out of place. On engines without a turbo, first you need to take out the tensioner and idler pulley under the water pump, then two parts of the timing belt assembly from the left camshaft, and finally remove the cover from the back of the engine where timing belt runs. For cars with turbo engines, take off these three parts from both sides of the water pump: the timing belt tensioner and idler pulleys sitting just above and below pump, and the camshaft position sensor. You should remove all bolts from the water pump, get the pump and old gasket apart from the engine, and completely take off any residue from the old gasket while cleaning the surfaces. Make sure the replacement pump matches what you took off, put sealant on both sides of a fresh gasket, and place it on the pump. Spread RTV sealant on the threads of each mounting bolt, place the water pump gently, making sure it sits correctly with the gasket, then screw in the bolts without over-tightening. Start with the middle bolt on the right side of the bolts, tighten them clockwise, check the torque rate after, and complete all bolts following this pattern. To finish installing the water pump, you follow the same steps in reverse order: put back all the parts you took out for access, attach the hoses to the pump, use firm grip to turn your hose clamps tightly, top up your cooling system, and make sure your drivebelt is set correctly.