How to Replace a Water Pump on Subaru Impreza?

Drain the cooling system and disconnect the radiator and bypass hoses from the water pump. Remove the cooling fans, drivebelt cover, drivebelts, timing belt, and crankshaft pulley. Remove the timing belt tensioner, idler pulley(s), and on turbo models, the CMP sensor and left side camshaft sprockets. Remove the left side rear timing belt cover and belt tensioner bracket. Loosen the water pump bolts, remove the pump and gasket, and clean the engine mounting surface. Ensure bolt threads and engine holes are corrosion-free. Compare the new and old pump, apply sealant to the new gasket and install it on the pump. Apply RTV sealant to bolt threads, align the pump and gasket on the engine, and tighten the bolts in 1/4-turn increments. Reattach hoses, refill the cooling system, and check drivebelt tension.

Genuine Subaru Impreza Water Pump

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14 Water Pumps found

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Subaru Impreza Water Pump Assembly
Part Number: 21110AA690
$149.74 MSRP: $218.92
You Save: $69.18 (32%)
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:
- 2012-2016 Subaru Impreza | Base, Limited, Premium, Sport, Sport Limited
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Subaru Impreza Water Pump Complete
Part Number: 21111AA240
$112.88 MSRP: $163.60
You Save: $50.72 (31%)
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:
- 2004-2011 Subaru Impreza | STI, STI Limited, STI Special Edition, STI Sport, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4 Turbo
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Subaru Impreza Water Pump
Part Number: 21111AA007
$83.61 MSRP: $121.17
You Save: $37.56 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump Complete
- Replaces: 21111AA001, 21111AA003, 21111AA004, 21111AA000, 21111AA002, 21111AA006, 21111AA005
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1993-2005 Subaru Impreza | Base, Brighton, L, L+, LE, LS, LX, Outback, RS, TS | 1.8L H4, 2.2L H4, 2.2L H4 (New EVAPO), 2.2L H4 Series, 2.5L H4, 2.5L H4 DOHC, 2.5L H4 SOHC
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Subaru Impreza Water Pump Complete
Part Number: 21111AA250
$105.34 MSRP: $152.67
You Save: $47.33 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump
- Manufacturer Note: OIL COOLER X
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2011 Subaru Impreza | 2.5 GT, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
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Subaru Impreza Water Pump Complete
Part Number: 21111AA280
$132.50 MSRP: $192.03
You Save: $59.53 (31%)
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:
- 2006-2011 Subaru Impreza | 2.5i, 25i, Outback, Outback Sport | 2.5L H4
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Subaru Impreza Pump Assembly Water
Part Number: 21110AA740
$111.48 MSRP: $161.57
You Save: $50.09 (31%)
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Product Specifications
- Other Name: Water Pump Assembly
- Replaced by: 21110AA741
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2017-2021 Subaru Impreza | Base, Limited, Premium, Sport
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Subaru Impreza Water Pump
Part Number: 21111AA026
$127.65 MSRP: $185.00
You Save: $57.35 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump Complete
- Replaces: 21111AA023, 21111AA022, 21111AA021, 21111AA025
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2002-2004 Subaru Impreza | WRX | 2.0L H4 Turbo
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Subaru Impreza 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:
- 1993-1996 Subaru Impreza | Base, Brighton, L, L+, LE, LS, LX, Outback | 1.8L H4, 2.2L H4
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Subaru Impreza Water Pump
Part Number: 21111AA006
$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:
- 1997-1998 Subaru Impreza | Brighton, L, Outback, RS | 1.8L H4, 2.2L H4 (New EVAPO), 2.5L H4 DOHC
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Subaru Impreza 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 Impreza | Brighton, L, Outback | 1.8L H4, 2.2L H4, 2.2L H4 (New EVAPO)
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Subaru Impreza 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 Impreza | Brighton, L, LX, Outback | 1.8L H4, 2.2L H4, 2.2L H4 (New EVAPO)
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Subaru Impreza 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:
- 2024-2025 Subaru Impreza | 4 Cyl 2.0L, 4 Cyl 2.5L
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Subaru Impreza PUMP ASSY-WATER
Part Number: 21110AA741
$111.48 MSRP: $161.57
You Save: $50.09 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 21110AA740
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2022-2023 Subaru Impreza | 4 Cyl 2.0L 5MT, 4 Cyl 2.0L CVT
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Subaru Impreza 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 Impreza | Brighton, L, Outback | 1.8L H4, 2.2L H4, 2.2L H4 (New EVAPO)

Subaru Impreza Water Pump

The Subaru Impreza Water Pump circulates coolant within the engine block and radiator to control combustion heat. The Subaru cooling system contains the Water Pump, which spins a shaft supported in bearings by a belt-driven pulley from the crankshaft. On the other end, coolant is pumped from the lower radiator hose into the cylinder head and block passages by the Water Pump impeller, then on to the thermostat and radiator from which heat is discarded to air. The shaft has a tight seal to prevent leaking coolant that contaminates the bearings. The pumps found in Subaru Imprezas today are mainly aluminum-cast, with earlier ones made of cast iron. One of the common warning signs of a troubled Water Pump is dripping coolant on the exterior. It has also been noted that bearing wear will make a growling noise. In case the impeller breaks, overheating will occur. Consistent Water Pump performance safeguards every Impreza engine, allowing the Impreza to remain within safe temperatures across the Subaru lineup.

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

Water Pump Complete
21111AA240
Q:
How to Replace a Water Pump on Subaru Impreza?
Posted by Panat P.
A:
Drain the cooling system and disconnect the radiator and bypass hoses from the water pump. Remove the cooling fans, drivebelt cover, drivebelts, timing belt, and crankshaft pulley. Remove the timing belt tensioner, idler pulley(s), and on turbo models, the CMP sensor and left side camshaft sprockets. Remove the left side rear timing belt cover and belt tensioner bracket. Loosen the water pump bolts, remove the pump and gasket, and clean the engine mounting surface. Ensure bolt threads and engine holes are corrosion-free. Compare the new and old pump, apply sealant to the new gasket and install it on the pump. Apply RTV sealant to bolt threads, align the pump and gasket on the engine, and tighten the bolts in 1/4-turn increments. Reattach hoses, refill the cooling system, and check drivebelt tension.
Answered by Subaru Parts Specialist Edgar / Jul 19, 2024