Genuine Subaru Impreza STI Coolant Reservoir

Coolant Tank Reservoir

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10 Coolant Reservoirs found

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Subaru Impreza STI Tank Assembly Water
Part Number: 21132AA131
$117.20 MSRP: $169.85
You Save: $52.65 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Tank Assembly-Water; Reservoir Tank, Tank Assembly
- Replaces: 21132AA075, 21132AA130, 21132AA074
- 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 Reserve Tank Assembly Radiator
Part Number: 45150FE000
$57.37 MSRP: $83.15
You Save: $25.78 (31%)
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:
- 2004-2007 Subaru Impreza STI | STI, STI Limited, WRX, WRX TR | 2.0L H4 Turbo, 2.5L H4 Turbo
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Subaru Impreza STI Reserve Tank Assembly Radiator
Part Number: 45150AG011
$48.56 MSRP: $70.38
You Save: $21.82 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Expansion Tank, Reservoir, Reservoir Assembly
- 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 Tank Assembly Water
Part Number: 21132AA121
$80.67 MSRP: $116.92
You Save: $36.25 (31%)
Ships in 1-2 Business Days
ADD TO CART
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:
- 2008-2014 Subaru Impreza STI | 2.5 GT, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
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Subaru Impreza STI Reserve Tank Assembly Radiator
Part Number: 45150AG001
$44.17 MSRP: $64.02
You Save: $19.85 (32%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Reserve Tank Assembly-Radiator; Expansion Tank, Reservoir, Reservoir Assembly
- 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 Reserve Tank Assembly Radiator
Part Number: 45150AE000
$57.37 MSRP: $83.15
You Save: $25.78 (31%)
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:
- 2004-2007 Subaru Impreza STI | 25i, Outback, Outback Sport, RS, TS | 2.5L H4
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Subaru Impreza STI Tank Assembly Water
Part Number: 21132AA075
$117.20 MSRP: $169.85
You Save: $52.65 (31%)
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 Impreza STI | STI, WRX | 2.0L H4 Turbo, 2.5L H4 Turbo
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Subaru Impreza STI Tank Assembly Water
Part Number: 21132AA140
$89.71 MSRP: $130.02
You Save: $40.31 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank Assembly-Water; Tank
- 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
View related parts
Subaru Impreza STI Tank Assembly Water
Part Number: 21132AA120
$80.67 MSRP: $116.92
You Save: $36.25 (31%)
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:
- 2008-2009 Subaru Impreza STI | 2.5 GT, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
View related parts
Subaru Impreza STI Tank Assembly Water
Part Number: 21132AA130
$117.20 MSRP: $169.85
You Save: $52.65 (31%)
Ships in 1-3 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:
- 2005 Subaru Impreza STI | STI, WRX | 2.0L H4 Turbo, 2.5L H4 Turbo

Subaru Impreza STI Coolant Reservoir

The Subaru Impreza STI Coolant Reservoir is the heart of the pressure balancing engine cooling loop, which captures expanding fluid and feeds it back when temperatures fall to keep the turbo boxer happy and healthy. A Coolant Reservoir fixed above the radiator pushes air upward, helps prevent bubbling, and returns bubble-free coolant that keeps temperatures consistent. Each owner of the Impreza STI GD, GE, GR, and VA appreciates the clear shell that allows for quick detection of fill marks while remaining contained within high-quality Subaru plastics. During the first generation, the car had a vented Coolant Reservoir with a separate cap. Furthermore, this setup still allowed ethylene glycol to remain off the pavement and maintained the iconic Subaru reliability. Successive revisions adopted a much thicker wall and metal-capped pressurized Coolant Reservoir, allowing the high boost Impreza STI engine to maintain pressure at full throttle. To easily swap across years, it has a compact shape that drops directly into any Impreza STI bay while also supporting a wider Subaru performance community. The Coolant Reservoir reduces the risk of detonation and extends the life of the head gasket, while clearly molded min and max lines make checks fast. The Coolant Reservoir, by cycling excess fluid back, minimizes spills and shields painted panels, keeping driveways clean. It's an environmentally friendly win that shows off Subaru pride. The Coolant Reservoir has a unique pressure rated plastic and leak tight neck. Its factory fit dimensions make it superior to generic tanks. Every Impreza STI can push hard without overheating. This Coolant Reservoir is a simple yet effective insurance policy that's in keeping with Subaru's loyal character and the unrelenting performance of the Impreza STI.

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