From the brand
Product description
Why Alternator Health Matters on Subaru AWD Platforms
Once the engine is running, the alternator becomes the primary power source for:
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ECU, ignition, and fuel systems
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AWD control modules and sensors
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Electric power steering
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Headlights, HVAC, and accessories
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Charging and maintaining the battery
When alternator output drops, the battery gets forced to cover the deficit — briefly — and then fails early. Common symptoms include:
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Repeated dead batteries
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Flickering or dim headlights
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Charging system warning lights
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Electrical glitches and no-start situations
Replacing the alternator fixes the root cause, not just the symptoms.
Correct 90 Amp Output — Exactly What Subaru Designed
Subaru engineered these EJ25 platforms around a 90-amp charging system to balance electrical demand and long-term reliability. This alternator delivers:
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Stable voltage at idle
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Proper battery recharge after cold starts
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Consistent output with accessories running
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Reduced stress on wiring and electronic components
Not oversized. Not underpowered. Exactly right.
Compatible with Saab Models:
- 2006-2006 9-2X
Compatible with Subaru Models:
- 2006-2010 Forester
- 2004-2005 Impreza H4 2.5L
- 2006-2006 Impreza H4 2.5L
- 2006-2006 Impreza H4 2.5L WRX STI Submodel
- 2007-2010 Impreza H4 2.5L
OE Number:
- 11058N, 11058, 23700AA380, 23700AA420, 23700AA540, 23700AA541 , 32010646, A002TB3091, A002TB5391, A002TG0391
Specifications:
- Amperage: 90A
- Voltage: 12V
- Rotation: Clockwise
- Number of Grooves: 5-Groove Pulley
- Regulator Type: Internal
- Fan Type: Internal
Built for OE Fitment and Long-Term Reliability
This A-Premium alternator features:
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High-efficiency copper windings
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Internal voltage regulator for consistent output
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Precision-balanced internals for smooth operation
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OE-style mounting points and electrical connectors
The 5-groove pulley ensures proper belt alignment and quiet operation — because belt squeal is not part of the Subaru experience anyone asked for.
At Pro Street Online, we sell parts that actually solve problems. This alternator is:
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Vehicle-specific
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Correctly rated for Subaru 2.5L platforms
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Brand new — not recycled
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Designed to restore factory charging reliability
Perfect for daily drivers, winter beaters, and long-term ownership Subarus.
Ron Thacker –
Easy to install. work fine
Michael II –
This alternator works well. Fit perfectly and was easy to install. It was delivered on time and was packaged well to avoid damage during shipping. I would not hesitate to buy this again or recommend it to my friends
Paul Hurst –
the alternator light comes on then goes off for a while. test show it is charging. can a replacement alternator be sent ?
Hyper Speed Media –
One month later, the alternator is giving me issue. Alternator light would go on and off as if it’s not charging correctly. I’ve replace and test all part of the charging system, and it point to being a bad alternator.
Ed Diluccio –
Came when promised and perfect fit
david w –
Works very well. Charges at 14.45 volts. Very good
Brian –
I bought this one and it turns bad after 5 months. I don’t recommend this
Luis Eduardo López parrilla –
It didn’t fit with my Subaru forester 2008
Jordan Baboolal –
Fits 2009 Forester No Problem
Fit perfectly no issues after install and testing
Northof49 –
Seems to be working fine
Arrived quickly and never having done one before I had it installed and under 45 minutes. probably would’ve been less time but I took a couple of coffee breaks and so far so good and will update the review if anything goes wonky with it