Genuine Subaru Impreza STI Coolant Reservoir Hose

Water Bypass Hose

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21 Coolant Reservoir Hoses found

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Subaru Impreza STI Radiator Hose Outlet
Part Number: 45161AG010
$18.63 MSRP: $27.00
You Save: $8.37 (31%)
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Product Specifications
- Other Name: Hose-Radiator Outlet; Lower Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | 2.5 GT, 2.5i, Outback Sport, STI, STI Special Edition, STI Sport, WRX, WRX Sport, WRXSS | 2.5L H4, 2.5L H4 Turbo
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Subaru Impreza STI Hose Over Flow
Part Number: 45162AG021
$5.96 MSRP: $8.28
You Save: $2.32 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Hose-Reserve Tank; Overflow Hose, Reservoir Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2011 Subaru Impreza STI | 2.5i, Outback Sport | 2.5L H4
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Subaru Impreza STI Radiator Inlet Hose
Part Number: 45161AG000
$25.30 MSRP: $36.67
You Save: $11.37 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Hose-Radiator Inlet; Upper Hose
- Replaces: 45161AG070
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | 2.5 GT, 2.5i, Outback Sport, STI, STI Special Edition, STI Sport, WRX, WRX Sport, WRXSS | 2.5L H4, 2.5L H4 Turbo
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Subaru Impreza STI Radiator Inlet Hose
Part Number: 45161FE050
$17.91 MSRP: $25.95
You Save: $8.04 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose-Radiator Inlet; Upper Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza STI | 25i, Outback, Outback Sport, RS, STI, STI Limited, TS, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4, 2.5L H4 Turbo
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Subaru Impreza STI Radiator Hose Outlet
Part Number: 45161AE020
$18.00 MSRP: $26.08
You Save: $8.08 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose-Radiator Outlet; Lower Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza STI | 25i, Outback, Outback Sport, STI, STI Limited, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4, 2.5L H4 Turbo
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Subaru Impreza STI Radiator Inlet Hose
Part Number: 45161AG070
$25.30 MSRP: $36.67
You Save: $11.37 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose-Radiator Inlet
- Replaced by: 45161AG000
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | 2.5i, Outback Sport, STI, STI Special Edition, STI Sport, WRX, WRX Sport | 2.5L H4, 2.5L H4 Turbo
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Subaru Impreza STI Hose P
Part Number: 45162AE000
$19.53 MSRP: $28.30
You Save: $8.77 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Coolant Hose, Inner Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza STI | STI, STI Limited, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4 Turbo
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Subaru Impreza STI Hose Q
Part Number: 45162FG010
$14.19 MSRP: $20.57
You Save: $6.38 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Reservoir Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | STI, STI Special Edition, STI Sport | 2.5L H4 Turbo
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Subaru Impreza STI Hose Overflow A
Part Number: 45162FE000
$19.53 MSRP: $28.30
You Save: $8.77 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose-Reserve Tank; Overflow Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza STI | STI, STI Limited, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4 Turbo
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Subaru Impreza STI Hose Over Flow
Part Number: 45162AG041
$5.96 MSRP: $8.28
You Save: $2.32 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose; Overflow Hose, Reservoir Hose
- Replaces: 45162AG040
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | 2.5 GT, STI, STI Special Edition, STI Sport, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
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Subaru Impreza STI Hose P
Part Number: 45162FG000
$9.06 MSRP: $12.58
You Save: $3.52 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Reservoir Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | STI, STI Special Edition, STI Sport | 2.5L H4 Turbo
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Subaru Impreza STI Hose P
Part Number: 45162AG000
$10.28 MSRP: $14.28
You Save: $4.00 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | 2.5 GT, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
View related parts
Subaru Impreza STI Radiator Hose Outlet
Part Number: 45161AE010
$17.45 MSRP: $25.28
You Save: $7.83 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose-Radiator Outlet; Lower Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2005 Subaru Impreza STI | Outback, RS, TS | 2.5L H4
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Subaru Impreza STI Hose Over Flow
Part Number: 45162AG031
$8.52 MSRP: $11.83
You Save: $3.31 (28%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Hose-Reserve Tank; Overflow Hose, Reservoir Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | 2.5 GT, STI, STI Special Edition, STI Sport, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
View related parts
Subaru Impreza STI Hose Reserve Tank
Part Number: 45162AE020
$7.91 MSRP: $10.98
You Save: $3.07 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose-Reserve Tank; Overflow Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza STI | 25i, Outback, Outback Sport, RS, TS | 2.5L H4
View related parts
Subaru Impreza STI Hose
Part Number: 45162AG040
$5.96 MSRP: $8.28
You Save: $2.32 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 45162AG041
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2009 Subaru Impreza STI | 2.5 GT, STI, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
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Subaru Impreza STI Hose Reserve Tank
Part Number: 45162AG030
$10.36 MSRP: $14.38
You Save: $4.02 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose-Reserve Tank; Overflow Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008 Subaru Impreza STI | STI, WRX, WRX Sport | 2.5L H4 Turbo
View related parts
Subaru Impreza STI Hose Overflow B
Part Number: 45162FE010
$5.68 MSRP: $7.88
You Save: $2.20 (28%)
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Product Specifications
- Other Name: Hose; Connector Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza STI | STI, STI Limited, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4 Turbo
View related parts
Subaru Impreza STI Hose Q
Part Number: 45162AE010
$26.04 MSRP: $37.73
You Save: $11.69 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Coolant Hose, Outer Hose, Reservoir Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza STI | STI, STI Limited, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4 Turbo
View related parts
Subaru Impreza STI Hose Q
Part Number: 45162AG010
$10.28 MSRP: $14.28
You Save: $4.00 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Hose
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2014 Subaru Impreza STI | 2.5 GT, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo

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1-20 of 21 Results

Subaru Impreza STI Coolant Reservoir Hose

The Subaru Impreza STI Coolant Reservoir Hose serves a purpose in the turbocharged boxer engine. It transfers excess coolant from the overflow tank to the radiator and back. This will help keep pressure and temperature stable during spirited drives. Owners of the Impreza STI appreciate how this Coolant Reservoir Hose inhibits harmful air pockets, prevents corrosive fluid from leaking free onto the road, and therefore increases both environmental responsibility and mechanical health. The OE-style Coolant Reservoir Hose, manufactured using precision molding, winds through the tight confines of the engine bay without kinking. This makes for a quick and hassle-free install. Once clamped down, the seal will stay tight even when subjected to track level g-forces. The Coolant Reservoir Hose for flexible ribbed hose workhorse versions bends easily to suit custom layouts while remaining resistant to heat and vibration for drivers who swap parts during upgrades. Regardless of which model you choose, the Coolant Reservoir Hose fits multiple years of the Impreza STI platform, from early rally inspired editions to the recent street dominators, offering a reliable solution across generations. The consistent flow of coolant means the responsive Impreza STI throttle stays sharp on the mountain passes. Sensors continuously read ideal temperatures. Within every Subaru cooling loop, sensors react promptly, allowing the Subaru traction systems to work at peak efficiency. The Coolant Reservoir Hose is built with thick rubber walls that are reinforced for chemical resistance, and even though this hose has a reputation for long life, it is so inexpensive that it is smart to replace it at the first sign of cracks. That way, you can be sure every Subaru boxer runs as cleanly as possible. To add one more layer of safety, the Coolant Reservoir Hose helps to prevent the head gasket from seeing spikes in temperature. The head gasket is a common failure point for the STI when pushed in competition. Track regulars appreciate how the Subaru Impreza STI sings at redline, all while a new Coolant Reservoir Hose quietly does its job.

Our website stands as the go-to online destination for OEM Subaru Impreza STI Coolant Reservoir Hose. With complete lines of genuine Subaru Impreza STI Coolant Reservoir Hose 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.

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2014 Coolant Reservoir Hose 2013 Coolant Reservoir Hose 2012 Coolant Reservoir Hose 2011 Coolant Reservoir Hose 2010 Coolant Reservoir Hose 2009 Coolant Reservoir Hose 2008 Coolant Reservoir Hose 2007 Coolant Reservoir Hose 2006 Coolant Reservoir Hose 2005 Coolant Reservoir Hose 2004 Coolant Reservoir Hose