SUBARU Rebuilt Alternators – Genuine Core Used, Rebuilt in Japan


Alternator

SUBARU Rebuilt Alternators – Product Information

VehicleModelGenuine Part NumberPart NumberManufacturerVoltage/Current Engine
IMPREZAGC823700AA202A2T39091Mitsubishi12VEJ20
IMPREZA
IMPREZA Wagon
Forester
Legacy
GC2,GC8,GF1,GF2,GF8
SF5,SF9,SG5,SG9
BE5,BH5
23700AA380A2TB3091Mitsubishi12VEJ20
EJ15
IMPREZA
Forester
GC1,GC2,GC8
SF5
23700AA280A2TA7591Mitsubishi12VEJ20
IMPREZAGDB
GG2,GG3
23700AA420A2TB5391Mitsubishi12VEJ20
IMPREZAGDB
GGC
23700AA540A2TG0391Mitsubishi12VEJ20
IMPREZA
Legacy
GH
GVF
BP5
23700AA522A3TG0491Mitsubishi12VEJ20
EJ25
EL154
IMPREZA
Forester
Legacy
GH
SH
BP,BL
23700AA520
23700AA521
A3TG0491Mitsubishi12VEJ20
EJ25
IMPREZAGH823700AA871A3TG6591CMitsubishi12VEJ20
IMPREZAGC4,GC6,GC823700AA230A2T37291Mitsubishi12VEJ20
EJ18
IMPREZAGVB,GVF
GRB,GRF
23700AA860A3TG0491BMitsubishi12VEJ20
EJ257
IMPREZAGP7
G4,GJ3,GJ2,GJ6
23700AA720A2TL0291Mitsubishi12VEJ20
VivioKK3,KK4,KW3,KW423700KA560101211-3001DENSO12VEN07
SambarTT2,TV2,TT123700KA770A1TA2091Mitsubishi12VEN07V
SambarKR1,KR2,KR5,KR6,KT1,KT2,KT623700KA060100211-4020DENSO12VEK23
SambarKS3,KS4,KV3,KV423700KA600100211-9360DENSO12VEN07
SambarTV1,TV2,TT1,TT223700KA881
23700KA880
A1TG0591AMitsubishi12VEN07
SambarKS3,KS4,KV,KV423700KA500100211-9270DENSO12VEN07
SambarKS3,KS4,KV,KV423700KA601100211-9361DENSO12VEN07

Part prices vary depending on the vehicle model

If you do not know the part number, please provide your vehicle’s chassis number, and we will help verify the compatible parts for your car.

For alternators, the manufacturer’s part number is usually printed on a sticker attached to the unit. If the number is still visible and the sticker is not damaged, please provide that number.

For more details on the rebuilt parts supplied by Auto Parts Box Japan, please see the following pages:

Contact Us

Feel free to contact us with any questions or service requests.

Alternator: Basic Functions and Common Problems

A detailed explanation of the alternator’s role, structure, and common signs of malfunction is available at the link below.
Please feel free to take a look if you’re interested.

Common Alternator Problems

  • Battery Warning Light Turns On
  • Battery Frequently Dies (Even After Replacing with a New One)
  • Engine is Hard to Start or Won’t Start
  • Headlights or Electrical Components Work Unreliably
  • Unusual Noise from the Engine Compartment
  • A Strong, Sharp Smell
  • Steering Feels Heavy While Driving
  • Engine Stalls While Driving

Alternator FAQ

Why is my battery warning light on while driving?

The battery warning light often indicates that the alternator is not charging the battery properly. Possible causes include a worn-out voltage regulator, broken belt, or poor electrical connections.

Can a bad alternator drain my battery?

Yes. If the alternator is undercharging or overcharging, it can either fail to recharge the battery or damage it, leading to frequent battery failure—even after replacement.

What are the signs of a failing alternator?

Common signs include dim headlights, engine stalling, unusual noises, burning smells, and difficulty starting the engine.

How long does an alternator typically last?

An alternator can typically last between 80,000 to 150,000 kilometers (about 50,000 to 100,000 miles), depending on driving conditions and electrical load.

What causes alternator failure?

Common causes include worn brushes or bearings, a damaged stator or rotor, faulty voltage regulator, and overheating due to poor ventilation.

Should I replace my alternator with a used, rebuilt, or brand-new unit?

Each option has its pros and cons:

  • Used Alternator:
    Affordable, but condition and lifespan are uncertain. Internal wear may not be visible, and there’s no guarantee how long it will last. Best suited for short-term use or temporary fixes.
  • Rebuilt Alternator:
    A cost-effective and reliable option when rebuilt by professionals using genuine components. It’s fully inspected, worn parts are replaced, and performance is restored. Ideal for those seeking quality and savings.
  • Brand-New Alternator:
    Offers maximum reliability and warranty coverage, but typically comes at a higher price. Best for those prioritizing long-term peace of mind and minimal downtime.

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