Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025
Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025
Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025
Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025
Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025
Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025
Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025

Alternator for Volkswagen Jetta, Beetle 1999-2005, Golf 1999-2006 400-24025

Item #: 400-24025

30-DAY RETURN POLICY

If your order arrives and it’s not exactly what you want, you may return it within 30 days for a refund. We know that people sometimes order a part and then discover it’s not exactly the one they need for the repair. We understand and want to work with you. Just make sure the item is in its original packaging and in good condition free of damage.

When a returned product comes back to us, we’ll check it over to make sure it’s in ‘Like New’ condition and free from damage such as dents, scratches, cracks, abuse, defacement or indication of removed screws/fasteners or seals. Return processing may take up to 5 business days from the time your product is received by DB Electrical.

To return a product, simply click here to start the process.

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DB Electrical alternators are highly engineered for excellence in performance.
  • Built to Beat the Heat: High temperature epoxy and high temperature grease withstand extreme heat
  • Heavy-duty rectifiers and high-quality regulators enhance superior charging performance
  • Most alternators are supplied with final test results and performance curve
  • Direct-fit replacement and easy installation made possible with OEM fitment specifications
  • Factory direct, money-saving alternator typically priced substantially less than OEM counterparts
Check if this fits your vehicle
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  • Product Info
  • Applications List
  • Part Replacement List
  • Policy Information
  • Reviews

Overview

DB Electrical Alternators for Volkswagen
DB Electrical offers premium-quality alternators that deliver high-performance for Volkswagen vehicles. Owners of these cars, vans and SUVs appreciate the highly engineered quality of DB Electrical alternators for flawless mechanical performance and longevity. The name Volkswagen means people’s car in German. A DB Electrical alternator is a great choice for keeping your Volkswagen on the road. (Check our applications table below for specific makes and models for this alternator.)

With DB Electrical alternators, you’ll get …

  • Superior Quality Every Time – Our aftermarket alternators deliver performance that’s equivalent to the original.
  • Direct-Fit OEM Replacement Parts – DB Electrical aftermarket alternators are designed for perfect fitment to replace the ones that originally came with your vehicle.
  • Engineer-Tested Excellence – Our alternators go through a rigorous testing program to ensure optimal performance. Most alternators are supplied with their final test results and performance curve.

Reasons to choose DB Electrical for your next alternator:

  • Built to Take the Heat – Most DB Electrical alternators offer high-temperature epoxy, heavy-duty rectifiers, high-quality regulators, top-quality bearings and high-temperature grease produce better charging and longer life under high-heat environments.
  • Brand New Alternator – Never settle for a secondhand one. Many places will try to sell you a used alternator for about the price we’ll sell you a new one.

The DB Electrical Advantage – Factory-Direct Pricing and 1-Year Warranty
DB Electrical sells its exceptional-quality electrical components at low factory-direct prices. DB Electrical delivers exceptional value for products that we stand behind with our total-confidence 1-year warranty. Yes, you have a full year to make sure your alternator meets your expectations.

Item Number: 400-24025

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Item ConditionAftermarket Part
Unit TypeAlternator
Voltage12
RotationCW
Amperage90
Pulley ClassS6
RegulatorIR
Fan TypeIF
FitsAUDI TT, VW MODELS 1999-04

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
BMWAuto and Light Truck318i19941.8L M42
BMWAuto and Light Truck318i19951.8L M42
BMWAuto and Light Truck318i19961.9L M44
BMWAuto and Light Truck318i19971.9L M44
BMWAuto and Light Truck318i19981.9L M44
BMWAuto and Light Truck318i19991.9L M44
BMWAuto and Light Truck318iC19941.8L M42
BMWAuto and Light Truck318iC19951.8L M42
BMWAuto and Light Truck318iC19961.9L M44
BMWAuto and Light Truck318iC19971.9L M44
BMWAuto and Light Truck318iS19941.8L M42
BMWAuto and Light Truck318iS19951.8L M42
BMWAuto and Light Truck318iS19961.9L M44
BMWAuto and Light Truck318iS19971.9L M44
BMWAuto and Light Truck318iS19981.9L M44
BMWAuto and Light Truck318iS19991.9L M44
BMWAuto and Light Truck318Ti19951.8L M42
BMWAuto and Light Truck318Ti19961.9L M44
BMWAuto and Light Truck318Ti19971.9L M44
BMWAuto and Light Truck318Ti19981.9L M44
BMWAuto and Light Truck318Ti19991.9L M44
BMWAuto and Light TruckZ3 Roadster19961.9L M44
BMWAuto and Light TruckZ3 Roadster19971.9L M44
BMWAuto and Light TruckZ3 Roadster19981.9L M44
VolkswagenAuto and Light TruckBeetle19981984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle19981984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckBEETLE19991.8L
VolkswagenAuto and Light TruckBeetle19991984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle19991984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckBEETLE19992.0L
VolkswagenAuto and Light TruckBEETLE20001.8L
VolkswagenAuto and Light TruckBeetle20001781cc 1.8L L4 APH
VolkswagenAuto and Light TruckBeetle20001984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle20001984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckBEETLE20002.0L
VolkswagenAuto and Light TruckBEETLE20011.8L
VolkswagenAuto and Light TruckBeetle20011781cc 1.8L L4 APH
VolkswagenAuto and Light TruckBeetle20011781cc 1.8L L4 AWV
VolkswagenAuto and Light TruckBeetle20011984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle20011984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckBeetle20011984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckBeetle20011984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckBEETLE20012.0L
VolkswagenAuto and Light TruckBEETLE20021.8L
VolkswagenAuto and Light TruckBeetle20021781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckBeetle20021781cc 1.8L L4 AWV
VolkswagenAuto and Light TruckBeetle20021896cc 1.9L L4
VolkswagenAuto and Light TruckBeetle20021896cc 1.9L L4 ALH Diesel
VolkswagenAuto and Light TruckBeetle20021984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle20021984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckBeetle20021984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckBEETLE20022.0L
VolkswagenAuto and Light TruckBEETLE20031.8L
VolkswagenAuto and Light TruckBeetle20031781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckBeetle20031781cc 1.8L L4 AWV
VolkswagenAuto and Light TruckBeetle20031896cc 1.9L L4 ALH Diesel
VolkswagenAuto and Light TruckBeetle20031984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle20031984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckBeetle20031984cc 2.0L L4 BDC
VolkswagenAuto and Light TruckBEETLE20032.0L
VolkswagenAuto and Light TruckBEETLE20041.8L
VolkswagenAuto and Light TruckBeetle20041781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckBeetle20041781cc 1.8L L4 AWV
VolkswagenAuto and Light TruckBeetle20041896cc 1.9L L4 ALH Diesel
VolkswagenAuto and Light TruckBeetle20041984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle20041984cc 2.0L L4 BEV
VolkswagenAuto and Light TruckBeetle20041984cc 2.0L L4 BGD
VolkswagenAuto and Light TruckBEETLE20042.0L
VolkswagenAuto and Light TruckBEETLE20051.8L
VolkswagenAuto and Light TruckBeetle20051781cc 1.8L L4 BKF
VolkswagenAuto and Light TruckBeetle20051896cc 1.9L L4
VolkswagenAuto and Light TruckBeetle20051984cc 2.0L L4
VolkswagenAuto and Light TruckBeetle20051984cc 2.0L L4 BEV
VolkswagenAuto and Light TruckBeetle20051984cc 2.0L L4 BGD
VolkswagenAuto and Light TruckBEETLE20052.0L
VolkswagenAuto and Light TruckBeetle20061896cc 1.9L L4
VolkswagenAuto and Light TruckBeetle20062480cc 2.5L L5
VolkswagenAuto and Light TruckBeetle20072480cc 2.5L L5
VolkswagenAuto and Light TruckBeetle Convertible20031984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckBeetle Convertible20041984cc 2.0L L4 BGD
VolkswagenAuto and Light TruckBeetle Convertible20051984cc 2.0L L4 BGD
VolkswagenAuto and Light TruckBeetle Hatchback20031896cc 1.9L L4
VolkswagenAuto and Light TruckBeetle Hatchback20031984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckBeetle Hatchback20031984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckBeetle Hatchback20041896cc 1.9L L4 ALH
VolkswagenAuto and Light TruckBeetle Hatchback20041896cc 1.9L L4 BEW
VolkswagenAuto and Light TruckBeetle Hatchback20041984cc 2.0L L4 BGD
VolkswagenAuto and Light TruckCABRIO19952.0L
VolkswagenAuto and Light TruckCABRIO19962.0L
VolkswagenAuto and Light TruckCABRIO19972.0L
VolkswagenAuto and Light TruckCABRIO19982.0L
VolkswagenAuto and Light TruckEUROVAN19922.5L
VolkswagenAuto and Light TruckEUROVAN19932.5L
VolkswagenAuto and Light TruckEUROVAN19942.5L
VolkswagenAuto and Light TruckEUROVAN19952.5L
VolkswagenAuto and Light TruckEUROVAN19992.8L
VolkswagenAuto and Light TruckEUROVAN20002.8L
VolkswagenAuto and Light TruckEUROVAN20012.8L
VolkswagenAuto and Light TruckEUROVAN20022.8L
VolkswagenAuto and Light TruckEUROVAN20032.8L
VolkswagenAuto and Light TruckGOLF19931.8L
VolkswagenAuto and Light TruckGOLF19931.9L Diesel
VolkswagenAuto and Light TruckGOLF19941.8L
VolkswagenAuto and Light TruckGOLF19941.9L Diesel
VolkswagenAuto and Light TruckGOLF19942.0L
VolkswagenAuto and Light TruckGOLF19942.8L
VolkswagenAuto and Light TruckGOLF19951.8L
VolkswagenAuto and Light TruckGOLF19951.9L Diesel
VolkswagenAuto and Light TruckGOLF19952.0L
VolkswagenAuto and Light TruckGOLF19952.8L
VolkswagenAuto and Light TruckGOLF19961.8L
VolkswagenAuto and Light TruckGOLF19961.9L Diesel
VolkswagenAuto and Light TruckGOLF19962.0L
VolkswagenAuto and Light TruckGOLF19962.8L
VolkswagenAuto and Light TruckGOLF19971.8L
VolkswagenAuto and Light TruckGOLF19971.9L Diesel
VolkswagenAuto and Light TruckGOLF19972.0L
VolkswagenAuto and Light TruckGOLF19972.8L
VolkswagenAuto and Light TruckGOLF19981.8L
VolkswagenAuto and Light TruckGOLF19981.9L Diesel
VolkswagenAuto and Light TruckGOLF19982.0L
VolkswagenAuto and Light TruckGOLF19982.8L
VolkswagenAuto and Light TruckGolf19991984cc 2.0L L4
VolkswagenAuto and Light TruckGolf19991984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckGOLF19992.0L
VolkswagenAuto and Light TruckGOLF19992.8L
VolkswagenAuto and Light TruckGOLF20001.8L
VolkswagenAuto and Light TruckGolf20001984cc 2.0L L4
VolkswagenAuto and Light TruckGolf20001984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckGOLF20002.0L
VolkswagenAuto and Light TruckGOLF20002.8L
VolkswagenAuto and Light TruckGOLF20011.8L
VolkswagenAuto and Light TruckGolf20011781cc 1.8L L4 AWD
VolkswagenAuto and Light TruckGolf20011781cc 1.8L L4 AWW
VolkswagenAuto and Light TruckGolf20011984cc 2.0L L4
VolkswagenAuto and Light TruckGolf20011984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckGolf20011984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckGolf20011984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckGOLF20012.0L
VolkswagenAuto and Light TruckGOLF20012.8L
VolkswagenAuto and Light TruckGOLF20021.8L
VolkswagenAuto and Light TruckGolf20021781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckGolf20021896cc 1.9L L4
VolkswagenAuto and Light TruckGolf20021896cc 1.9L L4 ALH Diesel
VolkswagenAuto and Light TruckGolf20021984cc 2.0L L4
VolkswagenAuto and Light TruckGolf20021984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckGolf20021984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckGOLF20022.0L
VolkswagenAuto and Light TruckGOLF20022.8L
VolkswagenAuto and Light TruckGolf20022792cc 2.8L V6 AFP
VolkswagenAuto and Light TruckGOLF20031.8L
VolkswagenAuto and Light TruckGolf20031781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckGolf20031896cc 1.9L L4
VolkswagenAuto and Light TruckGolf20031896cc 1.9L L4 ALH Diesel
VolkswagenAuto and Light TruckGolf20031984cc 2.0L L4
VolkswagenAuto and Light TruckGolf20031984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckGOLF20032.0L
VolkswagenAuto and Light TruckGOLF20032.8L
VolkswagenAuto and Light TruckGOLF20041.8L
VolkswagenAuto and Light TruckGolf20041781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckGolf20041896cc 1.9L L4 ALH
VolkswagenAuto and Light TruckGolf20041984cc 2.0L L4
VolkswagenAuto and Light TruckGolf20041984cc 2.0L L4 BEV
VolkswagenAuto and Light TruckGOLF20042.0L
VolkswagenAuto and Light TruckGOLF20042.8L
VolkswagenAuto and Light TruckGOLF20051.8L
VolkswagenAuto and Light TruckGolf20051781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckGolf20051984cc 2.0L L4
VolkswagenAuto and Light TruckGolf20051984cc 2.0L L4 BEV
VolkswagenAuto and Light TruckGOLF20052.0L
VolkswagenAuto and Light TruckGOLF20052.8L
VolkswagenAuto and Light TruckGOLF20061.8L
VolkswagenAuto and Light TruckGolf20061984cc 2.0L L4
VolkswagenAuto and Light TruckGolf20061984cc 2.0L L4 BEV
VolkswagenAuto and Light TruckGOLF20062.0L
VolkswagenAuto and Light TruckJETTA19931.8L
VolkswagenAuto and Light TruckJETTA19931.9L Diesel
VolkswagenAuto and Light TruckJETTA19932.8L
VolkswagenAuto and Light TruckJETTA19941.8L
VolkswagenAuto and Light TruckJETTA19941.9L Diesel
VolkswagenAuto and Light TruckJETTA19942.0L
VolkswagenAuto and Light TruckJETTA19942.8L
VolkswagenAuto and Light TruckJETTA19951.8L
VolkswagenAuto and Light TruckJETTA19951.9L Diesel
VolkswagenAuto and Light TruckJETTA19952.0L
VolkswagenAuto and Light TruckJETTA19952.8L
VolkswagenAuto and Light TruckJETTA19961.8L
VolkswagenAuto and Light TruckJETTA19961.9L Diesel
VolkswagenAuto and Light TruckJETTA19962.0L
VolkswagenAuto and Light TruckJETTA19962.8L
VolkswagenAuto and Light TruckJETTA19971.8L
VolkswagenAuto and Light TruckJETTA19971.9L Diesel
VolkswagenAuto and Light TruckJETTA19972.0L
VolkswagenAuto and Light TruckJETTA19972.8L
VolkswagenAuto and Light TruckJETTA19981.9L Diesel
VolkswagenAuto and Light TruckJETTA19982.0L
VolkswagenAuto and Light TruckJETTA19982.8L
VolkswagenAuto and Light TruckJetta19991984cc 2.0L L4
VolkswagenAuto and Light TruckJetta19991984cc 2.0L L4 ABA
VolkswagenAuto and Light TruckJetta19991984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckJETTA19992.0L
VolkswagenAuto and Light TruckJETTA19992.8L
VolkswagenAuto and Light TruckJETTA20001.8L
VolkswagenAuto and Light TruckJetta20001781cc 1.8L L4 AWD
VolkswagenAuto and Light TruckJetta20001984cc 2.0L L4
VolkswagenAuto and Light TruckJetta20001984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckJETTA20002.0L
VolkswagenAuto and Light TruckJETTA20002.8L
VolkswagenAuto and Light TruckJETTA20011.8L
VolkswagenAuto and Light TruckJetta20011781cc 1.8L L4 AWD
VolkswagenAuto and Light TruckJetta20011781cc 1.8L L4 AWW
VolkswagenAuto and Light TruckJetta20011984cc 2.0L L4
VolkswagenAuto and Light TruckJetta20011984cc 2.0L L4 AEG
VolkswagenAuto and Light TruckJetta20011984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckJetta20011984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckJETTA20012.0L
VolkswagenAuto and Light TruckJETTA20012.8L
VolkswagenAuto and Light TruckJETTA20021.8L
VolkswagenAuto and Light TruckJetta20021781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckJetta20021896cc 1.9L L4
VolkswagenAuto and Light TruckJetta20021984cc 2.0L L4
VolkswagenAuto and Light TruckJetta20021984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckJetta20021984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckJETTA20022.0L
VolkswagenAuto and Light TruckJETTA20022.8L
VolkswagenAuto and Light TruckJetta20022792cc 2.8L V6 AFP
VolkswagenAuto and Light TruckJetta20022792cc 2.8L V6 BDF
VolkswagenAuto and Light TruckJETTA20031.8L
VolkswagenAuto and Light TruckJetta20031781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckJetta20031896cc 1.9L L4
VolkswagenAuto and Light TruckJetta20031896cc 1.9L L4 DIESEL
VolkswagenAuto and Light TruckJetta20031984cc 2.0L L4
VolkswagenAuto and Light TruckJetta20031984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckJetta20031984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckJETTA20032.0L
VolkswagenAuto and Light TruckJETTA20032.8L
VolkswagenAuto and Light TruckJETTA20041.8L
VolkswagenAuto and Light TruckJetta20041781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckJetta20041896cc 1.9L L4 ALH Diesel
VolkswagenAuto and Light TruckJetta20041896cc 1.9L L4 BEW Diesel
VolkswagenAuto and Light TruckJetta20041984cc 2.0L L4
VolkswagenAuto and Light TruckJetta20041984cc 2.0L L4 AVH
VolkswagenAuto and Light TruckJetta20041984cc 2.0L L4 AZG
VolkswagenAuto and Light TruckJetta20041984cc 2.0L L4 BBW
VolkswagenAuto and Light TruckJetta20041984cc 2.0L L4 BEV
VolkswagenAuto and Light TruckJETTA20042.0L
VolkswagenAuto and Light TruckJETTA20042.8L
VolkswagenAuto and Light TruckJETTA20051.8L
VolkswagenAuto and Light TruckJetta20051781cc 1.8L L4 AWP
VolkswagenAuto and Light TruckJetta20051984cc 2.0L L4
VolkswagenAuto and Light TruckJetta20051984cc 2.0L L4 BBW
VolkswagenAuto and Light TruckJetta20051984cc 2.0L L4 BEV
VolkswagenAuto and Light TruckJETTA20052.0L
VolkswagenAuto and Light TruckJetta Wagon20041896cc 1.9L L4 BEW
VolkswagenAuto and Light TruckJetta Wagon20051896cc 1.9L L4
VolkswagenAuto and Light TruckPASSAT19921.9L Diesel
VolkswagenAuto and Light TruckPASSAT19922.8L
VolkswagenAuto and Light TruckPASSAT19931.9L Diesel
VolkswagenAuto and Light TruckPASSAT19932.8L
VolkswagenAuto and Light TruckPASSAT19941.9L Diesel
VolkswagenAuto and Light TruckPASSAT19942.8L
VolkswagenAuto and Light TruckPASSAT19951.9L Diesel
VolkswagenAuto and Light TruckPASSAT19961.9L Diesel
VolkswagenAuto and Light TruckPASSAT19971.9L Diesel
VolkswagenAuto and Light TruckTYPE II (MINI BUS)19932.5L
VolkswagenAuto and Light TruckVANAGON19922.5L
VolkswagenAuto and Light TruckVANAGON19932.5L

Replaces These Part Numbers

ANDRE NIERMANN02325003
ARROWHEADIA1147, MG556
ARROWHEADABO0193, 400-24025
BARSANCO170-13852
BOSCH0-124-325-003, 0-124-325-011, 0-124-325-032
BOSCH REMAN EUROPE0-986-041-500, 0-986-044-380
CARGO111989, 113887
DELCO REMAN (EUROPE)DRB1500
DIXIEA-6385
EMS13852N
HC PARTSCA1378IR
IATA13852
J&N Electrical Products400-24025, 400-40025
LESTER13852
LETRIKA (ISKRA) AFTERMARKETIA 1147
LUCAS ELECTRICAL EUROPELRB00145, LRB00486
MAHLEMG556
NAPA POWER NEW1N-9172
NAPA POWER PREMIUM PLUS213-9172
NAPA POWER SUPREME13-9172
PIC220-5103, 220-5103B
REMY LIGHT DUTY12038, 12424, 94105
USA INDUSTRIESA2952
VALEO SHORTVA364
VOLKSWAGEN028-903-028D, 028-903-028DX, 037-903-025F, 038-903-018A
WAGNER439311
WAI1-2520-01BO, 13852N-6G
WILSON90-15-6333
WILSON NEW90-15-6333
WOOD AUTOALT10286

Frequently Asked Questions

Q: Do I need a larger charge wire for a High Output unit?
A: The high amp unit will operate better than stock, but not to its full potential without a larger charge wire. It’s the same reason firetrucks do not use garden hoses. It is IMPARATIVE to have proper charge and ground cables.

Q: Does a High Amp unit cause any damage to my battery or my vehicles charging system?
A: As long as it is installed properly with battery in good condition, then no. A High Output unit works exactly like a factory unit and only produces what is being demanded. No alternator works continuously at full output. Higher amperage is not bad and will not hurt a battery, but high voltage will blow one up.

Q: Will aftermarket underdrive pulleys (crankshaft power pulley) have any effect on my alternator?
A: Yes, underdrive crankshaft pulleys slow all the components (power steering, a/c, and alternator) to provide more power to the rear wheels. In some cases, the charging systems will fall totally on the battery at idle and completely stop charging.

Q: Where is the best place to get a voltage reading of the alternator output?
A: You’ll get the most accurate voltage reading from the back of the alternator at the main charge post that runs directly to the battery. This must be done while the vehicle is running.

Q: Why is the pulley on a high amp alternator smaller than my stock pulley?
A: The smaller pulley advances the power curve of the alternator just slightly, which produces a little more amperage around the idle if needed.

Q: Will I need a smaller belt for my high amp unit?
A: This varies by application because not all belts and belt tensioners are in the same condition. The tensioner will always tell you if you need a new belt or not. If it’s in range, you will not. If it is out, you will. Generally, you will need a belt that is one inch shorter than stock. You should have no problem finding a replacement wherever you buy your parts. V belt applications simply re-adjust your belt tensions to 3/8” deflection.

Q: What is the difference between a one wire, self-exciting and a self-energizing regulator?
A: Nothing. They are all exactly the same. Different manufacturers use different terms for marketing. The only wire to hook up is the charge wire to the battery. This does require modification for the alternator charge light on the dash.

Q: My stock unit used a five-groove pulley, and you sent my high amp alternator with a 6 groove. Why and what can I do?
A: 5 groove overdrive pullies are not produced. Install the belt on the back groove of the pulley closest to the fan or body of the alternator. The fan is internal, and this application will work just fine.

Q: Can your alternator be run in dual or triple alternator applications?
A: Yes. When wired and mounted correctly, the alternator can run in either dual or triple applications.

Q: Will I need a new battery with a high amp alternator?
A: If your battery is in good condition, and in spec of its OEM rating, then no. Your battery should work equally well with either the OEM and a High Amp unit.

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