How to remove and install an alternator in a Subaru Forester?

Disconnect the cable from the negative battery terminal. Remove the drivebelt cover and remove the alternator drivebelt. If the vehicle is equipped with cruise control, and if the cruise control cable is clipped to the small bracket that's located right behind the alternator electrical connector, detach the clip and set the cable aside to give yourself more room to work. Disconnect the battery cable and the electrical connector from the alternator. Remove this nut and disconnect the battery cable from the B+ terminal, then depress the release tab and disconnect the electrical connector from the alternator. Remove the adjustment and pivot bolts and separate the alternator from the engine. To detach the alternator from the engine, remove the adjustment bolt and the pivot bolt, then lilt the alternator out of the engine compartment. Installation is the reverse of removal. After the alternator is installed, adjust the drivebelt tension.

Genuine Subaru Forester Alternator

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18 Alternators found

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Subaru Forester Alternator Assembly
Part Number: 23700AB030
$507.71 MSRP: $748.83
You Save: $241.12 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Alternator Assy
- Replaces: 23700AA760, 23700AA761
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2014-2018 Subaru Forester | 2.0XT Premium, 2.0XT Touring, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.0L H4, 2.5L H4
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Subaru Forester Alternator Assembly
Part Number: 23700AB000
$507.71 MSRP: $748.83
You Save: $241.12 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaces: 23700AA921
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2017-2018 Subaru Forester | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.5L H4
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Subaru Forester 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:
- 2006-2010 Subaru Forester | Forester Sports, L.L.Bean, X, X Limited, XS | 2.5L H4, 2.5L H4 SOHC
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Subaru Forester Alternator Assembly
Part Number: 23700AA521
$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:
- 2006-2010 Subaru Forester | Forester Sports, XT, XT Limited | 2.5L H4 DOHC Turbo, 2.5L H4 Turbo
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Subaru Forester Alternator Assembly
Part Number: 23700AA870
$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
- Replaced by: 23700AA871
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013 Subaru Forester | XT, XT Limited | 2.5L H4 DOHC Turbo
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Subaru Forester Alternator Assembly
Part Number: 23700AB051
$373.21 MSRP: $471.81
You Save: $98.60 (21%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: ALTNTR Assembly
- Replaces: 23700AB050, 23700AB13A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2019-2021 Subaru Forester | Base, Limited, Premium, Sport, Touring
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Subaru Forester Alternator Generator
Part Number: 23700AB050
$373.21 MSRP: $471.81
You Save: $98.60 (21%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: ALTNTR Assembly
- Replaced by: 23700AB051
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2019-2020 Subaru Forester | Base, Limited, Premium, Sport, Touring
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Subaru Forester ALTERNATOR
Part Number: 23700AA761
$507.71 MSRP: $748.83
You Save: $241.12 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pb001570 Alternator Assy
- Replaced by: 23700AB030
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2015-2018 Subaru Forester | 2.0XT Premium, 2.0XT Touring, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.0L H4, 2.5L H4
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Subaru Forester ALTNTR ASSY
Part Number: 23700AB220
$446.35 MSRP: $658.33
You Save: $211.98 (33%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2025 Subaru Forester | 4 Cyl 2.5L
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Subaru Forester Alternator Assembly
Part Number: 23700AA921
$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
- Replaced by: 23700AB000
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2017 Subaru Forester | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.5L H4
View related parts
Subaru Forester 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:
- 2003-2005 Subaru Forester | L.L.Bean, X, XS, XT | 2.5L H4, 2.5L H4 Turbo
View related parts
Subaru Forester Alternator Assembly
Part Number: 23700AA760
$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
- Replaced by: 23700AB030
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2014-2015 Subaru Forester | 2.0XT Premium, 2.0XT Touring, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring | 2.0L H4, 2.5L H4
View related parts
Subaru Forester Alternator Assembly
Part Number: 23700AA701
$491.46 MSRP: $724.87
You Save: $233.41 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy; Alternator
- Replaced by: 23700AA7018A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011-2013 Subaru Forester | X, X Limited, X Premium | 2.5L H4 DOHC
View related parts
Subaru Forester Alternator Assembly
Part Number: 23700AA700
$491.46 MSRP: $724.87
You Save: $233.41 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assy
- Replaced by: 23700AA7018A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011 Subaru Forester | X, X Limited, X Premium | 2.5L H4 DOHC
View related parts
Subaru Forester 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:
- 2011-2012 Subaru Forester | XT, XT Limited | 2.5L H4 DOHC Turbo
View related parts
Subaru Forester 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 Forester | XT, XT Limited | 2.5L H4 DOHC Turbo
View related parts
Subaru Forester Alternator Compatible
Part Number: 23700AA390
$554.04 MSRP: $817.17
You Save: $263.13 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Alternator Assembly; Alternator
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1999-2002 Subaru Forester | Base, L, S | 2.5L H4 SOHC
View related parts
Subaru Forester 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:
- 1998 Subaru Forester | Base, L, S | 2.5L H4 DOHC, 2.5L H4 DOHC (New EVAPO)

Subaru Forester Alternator

The Subaru Forester Alternator uses engine-driven mechanical energy to charge the battery and power the electrical systems of the vehicle. The Alternator is located at the front of the engine and is fed by a crankshaft belt that rotates a rotor mounted on a shaft inside stationary winding stators. The unit draws its power through this component belt, as seen within a Subaru Forester drivetrain layout. The stator, front and rear bearings, a pulley, cooling fan, brushes, and a rectifier assembly with diodes and heat sinks, plus a voltage regulator all fit within a two-piece cast aluminum housing. The rotor generates a rotating magnetic field due to alternating current supplied into the winding that alters the direction of current in the winding. For Subaru Forester models, the regulator commands can originate from the Powertrain Control Module. The regulation system of the Alternator varies the field current to prevent undercharging or overcharging and protect sensitive circuits. The Alternator generates electricity while the vehicle moves, lessening reliance on stored battery energy. A properly functioning Alternator ensures dependable starts and steady operation, letting every Subaru Forester maintain a stable electrical network.

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

Alternator Assembly
23700AA521
Q:
How to remove and install an alternator in a Subaru Forester?
Posted by Corey V.
A:
Disconnect the cable from the negative battery terminal. Remove the drivebelt cover and remove the alternator drivebelt. If the vehicle is equipped with cruise control, and if the cruise control cable is clipped to the small bracket that's located right behind the alternator electrical connector, detach the clip and set the cable aside to give yourself more room to work. Disconnect the Battery Cable and the electrical connector from the alternator. Remove this nut and disconnect the battery cable from the B+ terminal, then depress the release tab and disconnect the electrical connector from the alternator. Remove the adjustment and pivot bolts and separate the alternator from the engine. To detach the alternator from the engine, remove the adjustment bolt and the pivot bolt, then lilt the alternator out of the engine compartment. Installation is the reverse of removal. After the alternator is installed, adjust the drivebelt tension.
Answered by Subaru Parts Specialist Albert / Feb 24, 2025