How to Replace the Alternator on Subaru Impreza?

The tumble Alternator system, used in all turbocharged models, reduces emissions during start-ups through butterfly valves in the lower intake manifolds. When the engine is cold, the PCM activates the actuator, nearly closing the valves and creating a tumbling motion for a complete burn. Installation is the reverse of removal.

Genuine Subaru Impreza Alternator

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19 Alternators found

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Subaru Impreza Alternator Assembly
Part Number: 23700AA911
$505.40 MSRP: $745.43
You Save: $240.03 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Alternator Assy; Alternator
- Replaces: 23700AA910
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2015-2016 Subaru Impreza | Base, Limited, Premium, Sport, Sport Limited
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Subaru Impreza Alternator Assembly
Part Number: 23700AA540
$509.52 MSRP: $751.50
You Save: $241.98 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy
- Replaced by: 23700AA5418A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2010 Subaru Impreza | 2.5i, 25i, Outback, Outback Sport, STI | 2.5L H4, 2.5L H4 Turbo
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Subaru Impreza Alternator Assembly
Part Number: 23700AA521
$477.02 MSRP: $703.57
You Save: $226.55 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Alternator Assy
- Replaced by: 23700AA8608A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2010 Subaru Impreza | 2.5 GT, STI, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
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Subaru Impreza Alternator Assembly
Part Number: 23700AA690
$509.52 MSRP: $751.50
You Save: $241.98 (33%)
ADD TO CART
Product Specifications
- Other Name: Alternator Assy
- Replaced by: 23700AA6918A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011 Subaru Impreza | 2.5i, Outback Sport | 2.5L H4
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Subaru Impreza Alternator Assembly
Part Number: 23700AB051
$373.21 MSRP: $471.81
You Save: $98.60 (21%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: ALTNTR Assembly
- Replaces: 23700AB050, 23700AB13A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2024-2025 Subaru Impreza | 4 Cyl 2.5L
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Subaru Impreza Alternator Assembly
Part Number: 23700AA98A
$322.24 MSRP: $475.28
You Save: $153.04 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2017-2018 Subaru Impreza | Base, Limited, Premium, Sport
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Subaru Impreza ALTNTR ASSY
Part Number: 23700AB200
$446.35 MSRP: $564.29
You Save: $117.94 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2024-2025 Subaru Impreza | 4 Cyl 2.0L
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Subaru Impreza Alternator Assembly
Part Number: 23700AA370
$561.26 MSRP: $827.82
You Save: $266.56 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy; Alternator
- Replaced by: 23700AA3708A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005 Subaru Impreza | Outback, RS | 2.5L H4
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Subaru Impreza Alternator Generator
Part Number: 23700AA910
$505.40 MSRP: $745.43
You Save: $240.03 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assembly
- Replaced by: 23700AA911
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2015 Subaru Impreza | Base, Limited, Premium, Sport, Sport Limited
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Subaru Impreza Alternator Assembly
Part Number: 23700AA570
$477.02 MSRP: $703.57
You Save: $226.55 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy
- Replaced by: 23700AA8608A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2007 Subaru Impreza | STI, STI Limited, WRX, WRX TR | 2.5L H4 Turbo
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Subaru Impreza Alternator Assembly
Part Number: 23700AA681
$507.71 MSRP: $748.83
You Save: $241.12 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy; Alternator
- Replaced by: 23700AA871
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011 Subaru Impreza | STI, STI Special Edition, STI Sport, WRX, WRX Sport | 2.5L H4 Turbo
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Subaru Impreza Alternator Assembly
Part Number: 23700AA680
$507.71 MSRP: $748.83
You Save: $241.12 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy; Alternator
- Replaced by: 23700AA871
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011 Subaru Impreza | STI, STI Special Edition, STI Sport, WRX, WRX Sport | 2.5L H4 Turbo
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Subaru Impreza Alternator Assembly
Part Number: 23700AA691
$509.52 MSRP: $751.50
You Save: $241.98 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy; Alternator
- Replaced by: 23700AA6918A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011 Subaru Impreza | 2.5i, Outback Sport | 2.5L H4
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Subaru Impreza Alternator Compatible
Part Number: 23700AA390
$554.04 MSRP: $817.17
You Save: $263.13 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Alternator Assembly; Alternator
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1999-2001 Subaru Impreza | Brighton, L, Outback, RS, TS | 2.2L H4 Series, 2.5L H4 SOHC
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Subaru Impreza Alternator Assembly
Part Number: 23700AA720
$438.07 MSRP: $646.12
You Save: $208.05 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy
- Replaced by: 23700AA721
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2012-2014 Subaru Impreza | Base, Limited, Premium, Sport, Sport Limited
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Subaru Impreza Alternator Assembly
Part Number: 23700AA430
Product Specifications
- Other Name: Alternator Assy
- Replaced by: 23700AA430R1
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2002-2005 Subaru Impreza | Outback, RS, TS, WRX | 2.0L H4 Turbo, 2.5L H4
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Subaru Impreza Alternator Generator
Part Number: 23700AA98B
Product Specifications
- Other Name: Alternator Assy
- 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 Alternator Compatible
Part Number: 23700AA290
Product Specifications
- Other Name: Alternator Assembly; Alternator
- Replaced by: 23700AA2908A
- 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, 2.2L H4 (New EVAPO), 2.5L H4 DOHC
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Subaru Impreza Alternator Assembly
Part Number: 23700AA202
Product Specifications
- Other Name: Alternator Assy; Alternator
- 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

Subaru Impreza Alternator

The Subaru Impreza Alternator changes the mechanical energy of an engine into electric energy, which charges the battery and powers the electrical systems. The Alternator has a two-piece cast aluminum shell that encases a stationary stator positioned around the shaft of a rotor, which the engine drives via belt. The rotation of the rotor by the pulley causes a magnetic field to sweep across the stator windings, thereby inducing AC current, which the built-in diodes convert to DC for the Subaru electrical network. A cooling fan situated on the same shaft blows air across internal parts, while the front and rear bearings allow smooth rotation. The rear housing also accommodates the brushes, rectifier, and voltage regulator, which varies field current to keep the voltage within safe limits. The vehicle powertrain electronics on common Subaru Impreza models have been integrated with regulator control. A low voltage reading warns of attention needed on a Subaru Impreza, as the Subaru charging system relies upon the Alternator. In general, the mechanical motion of the Alternator combines with electromagnetic action, and the Alternator supplies every Impreza electrical need.

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

Alternator Assembly
23700AA540
Q:
How to Replace the Alternator on Subaru Impreza?
Posted by Oline S.
A:
The tumble Alternator system, used in all turbocharged models, reduces emissions during start-ups through butterfly valves in the lower intake manifolds. When the engine is cold, the PCM activates the actuator, nearly closing the valves and creating a tumbling motion for a complete burn. Installation is the reverse of removal.
Answered by Subaru Parts Specialist Gary / May 07, 2026