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25% Off Online Orders of Select Parts and Accessories. Enter Promo Code 25PEP in Cart

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25% Off All Online Orders of Select Parts and Accessories
Receive 25% Off Your Online Purchase. Use promotional code 25PEP at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 12/12/16. Online orders scheduled for in-store pick up must be completed by closing on 12/11/16 for discount to apply.

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  • Part #: 7128103|
  • SKU: 521099

6 days after 6 p.m.


    • All units are completely disassembled and reclaimed parts are cleaned, inspected and thoroughly tested
    • All wear parts are replaced in every unit, regardless of condition
Retail
$40.99
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

ProStart Remanufactured Alternator

ProStart remanufactured alternators represent a total commitment to quality. Each unit is built to last using components and techniques that make them as good as or better than the original equipment part. ProStart premium quality remanufactured alternators carry a limited lifetime warranty.
  • All units are completely disassembled and reclaimed parts are cleaned, inspected and thoroughly tested
  • All wear parts are replaced in every unit, regardless of condition
  • Each ProStart remanufactured alternator goes through three stages of testing; before, during, and at the end of the remanufacturing process
  • Each alternator receives all new brushes and bearings, pressure-fit high capacity diodes and precision polished slip-rings in addition to a thorough qualifying of the housing, stator and all reclaimed components
  • Every ProStart alternator is performance tested and required to pass OE specifications before leaving the factory
  • Our rigorous performance testing ensures your alternator will provide long-lasting, premium performance under all operating conditions
  • Auto part is backed with a limited lifetime warranty
  • Your alternator plays a critical role in your car, keeping your car battery charged and your electrical systems working correctly
  • Check out our wide assortment of car batteries, starters, and alternators and related parts
  • The Pep Boys Say: "Do the job once and do it right with the confidence that can only come from genuine ProStart alternators."


Regulator Plug Clocking Position:
3:00 O'clock
Weight:
11 pounds
Fan Location:
External
Manufacturer:
Delco
Amperage Rating:
42 A
Voltage Regulation Type:
Internal
Pulley Type:
Single V type pulley
Vehicle System Voltage:
12V

521099

Rated 4.3 out of 5 by 210 reviewers.
Rated 5 out of 5 by Alternator I ordered it online to save money since I had time to do the repair myself. It arrived 3 days faster than I thought it would and installing it was a snap. I started the engine and it seemed to work perfectly. February 5, 2014
Rated 4 out of 5 by Quality Product so far I've had this alternator in my car for about a month now, and it hasn't had a single issue. My only complaint is that the outer casing was pretty dirty out of the box, I wish they would have done a little more during the remanufacturing process to clean it up, but other than that I'm highly satisfied. The lifetime warranty is a huge selling point. February 5, 2014
Rated 4 out of 5 by Works as expected This product fit my 1997 Honda Civic DX and performs as expected. February 3, 2014
Rated 5 out of 5 by This product looks just like the factory one it replaced. Perfect replacement part. January 27, 2014
Rated 5 out of 5 by Product fit exactly Installed and operated as expected once pully was changed out by Pep Boys Manager excellent service. Switched out pully from old Alternator to new in store. This saved me from driving 20 miles to other store just for pully and other alternator. January 21, 2014
Rated 3 out of 5 by GOOD PRODUCT, BUT DEFECTIVE I bought this alternator to replace my original one. Original one lasted for 214k miles. The new product was a Bosch Re-Man. I put it on and started the car. Alternator made loud whine. I thought to myself, this can't be good. But I decided to let the car idle for a bit. The whining sound began to dissipate. So I thought, ok maybe it just needed to break-in. Drove the car for a couple weeks. Started to hear squeaking noises. I checked all the pulleys. Also checked the alternator pulley, as I spun it, I can hear a slight squeak in it. Took it back to Pep Boys and they were able to replace with a new one. Customer Service was great. January 13, 2014
Rated 5 out of 5 by Pretty good reman alternator Easy to install, came with good instructions. Also replaced the external regulator which is important. New reman alternator is charging battery fine now. I have bought Pep Boys brand ProStart alternator and starter now, both working fine. December 18, 2013
Rated 5 out of 5 by So far so good My car is back on the road, I haven't had any problems. I can't complain. December 15, 2013
Rated 3 out of 5 by Alternator squeek I had to machine down the inside, front of the pulley. The serpentine belt rolled up the side and started sqeeking. 1987 Grand National 3.8L Turbo December 2, 2013
Rated 5 out of 5 by Exact Fit and Function Alternator on my van had bad alternator decoupler pulley. Replacing the entire alternator was a better option. Purchased alternator works flawlessly and was a straightforward replacement. November 30, 2013
Rated 5 out of 5 by Work great. Price is the least expensive. November 17, 2013
Rated 5 out of 5 by Happy, happy, happy! The dealership wanted $1200 to replace the alternator in my wife's DTS. Every other store or website wanted at least $250 plus core charge, shipping etc. I ordered this alternator with free shipping for $165! It required some effort to replace but I saved myself $1000. No problems with warning lights after installation. Quality remanufactured part that fits perfectly. Thank you Pep Boys, you earned a customer for life! November 6, 2013
Rated 4 out of 5 by priced right This alt. hasn't let me down yet. So far so good. November 6, 2013
Rated 5 out of 5 by Couldn't have been simpler! I found this alternator online, ordered it, and it was waiting for me when I walked in. I was lucky enough to be able to bring in the old alternator, so there wasn't even a core charge. Installation was a snap. All necessary hardware was included. And it has been working like a champ! November 3, 2013
Rated 5 out of 5 by Working great so far! First starter on 97 Grand Jeep Chero! Working great so far hope the product continues to perform flawlessly ;) October 16, 2013
Rated 2 out of 5 by not great first one I got only lasted a week. Second one has been on for a few days and seems okay October 11, 2013
Rated 5 out of 5 by This product was a great buy and they had it in stock Every product I have gotten from PB has been GREAT Thank You the help I got from the woman was great she new her stuff,I have a auto parts store within 1 mile and PB is 11 more mils from me and I go to it. Great service thanks again. September 27, 2013
Rated 4 out of 5 by The product was exactly as advertised The alternator was in excellent condition and fit like a glove. It works great. September 3, 2013
Rated 1 out of 5 by COMPLETE JUNK First one lasted 11 months and 20k miles before the bearings went out. The second one straight out of the box had a output voltage of 13.6-13.8 VDC causing a low battery light. Where is the quality control? Wish I would have paid the $50 more to buy it from the dealership to get a working/ dependable product! August 30, 2013
Rated 5 out of 5 by Pro-start alternator This alternator fit perfectly upon installing. Couple hours of work later, my car was running again. I especially like the warranty it comes with. July 17, 2013
Rated 4 out of 5 by Works good. Have it running in the car for about a month now, and so far its been good. Fixed the issues I was having with the old unit. July 8, 2013
Rated 1 out of 5 by Unsteady voltage, no output when hot Voltage fluctuates 2 times a second from 13.3V to 14.1 V (13.6V average) causing all lights to flicker & pulsate. Alternator has NO output whatsoever when the unit is hot for up to 2 minutes after engine start. When cold the alternator kicks in immediately to 13.6V to 14.1V. I can't rely on this thing. June 27, 2013
  • 2016-12-08 T07:02:23.547-06:00
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