2002-06 Nissan Altima Sentra Alternator - 1AEAL00411

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Product Reviews
Vehicle Fit

Note: Please verify the battery circuit fuse is not damaged before replacing your alternator.  This is located on the positive terminal of the battery.  It’s common for this to fail and prevent the battery from charging properly.

Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Disconnecting the Battery (0:48)
    • Disconnect the negative battery cable with a 10mm socket and ratchet
  2. step : Removing the Engine Cover (0:59)
    • Remove the four 5mm Allen bolts from the engine cover
    • Remove the engine cover
  3. step : Removing the Alternator (1:19)
    • Remove the two 10mm bolts from the alternator
    • Disconnect the alternator wiring harness
    • Remove the 12mm bolt from the alternator
    • Attach a 14mm wrench to the serpentine belt tensioner
    • Use the wrench to loosen the belt
    • Pull the serpentine belt off the alternator
    • Release the tensioner
    • Remove the upper of the two 14mm bolts from the alternator
    • Pull off the fuse box cover
    • Remove the 10mm bolt from the fuse box
    • Lift the fuse box and pull it aside
    • Remove the lower of the two 14mm bolts from the alternator
    • Pry out your alternator with a pry bar
  4. step : Installing the New Alternator (3:22)
    • Put the new alternator into place
    • Start the lower 14mm bolt into the alternator
    • Insert the upper 14mm bolt into the alternator
    • Tighten the lower 14mm bolt
    • Insert the two 10mm bolts into the alternator
    • Put the alternator bracket into place
    • Connect the alternator wiring harness
    • Reconnect the wire from the battery to the alternator and tighten its nut
    • Move the fuse box into place
    • Insert the 10mm bolt into the fuse box
    • Push on the fuse box cover
    • Attach a 14mm wrench to the belt tensioner
    • Loosen the tensioner
    • Pull the belt onto the alternator
    • Release the tensioner
  5. step : Reconnecting the Battery (5:27)
    • Reconnect the negative battery cable
  6. step : Reinstalling the Engine Cover (5:36)
    • Put the engine cover into place
    • Insert the four 5mm Allen bolts into the engine cover

Tools needed for replacement:

    Allen Wrenches

  • 5mm Allen Wrench

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Screwdrivers & Related

  • Pry Bar

  • Sockets - Metric

  • 12mm Socket
  • 10mm Socket
  • 14mm Socket
  • 13mm Socket
  • 11mm Socket

  • Wrenches - Metric

  • 14mm Wrench

4.47/ 5.0
19 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Perfect fit and appears to be good quality
Installed this alternator on my 04 Altima. Perfect fit and has over 250 miles on it. Appears to be high quality. Well see on longevity.
August 12, 2016
Easy installation
The alternator works like a charm. It was super easy to install on a 2003 Altima 4cylinder. I even made a youtube video to show everyone.
March 16, 2017
1A Auto...My new favorite
After checking out the video 1A put on youtube showing how to replace the alternator on my Nissan Altima I checked around for pricing and...back to 1A! Combine the videos, which we non-mechanics need, and their price AND the fact that it arrived faster than quoted and...Im a fan. Ill just go to 1A in the future and save time! Thanks for a great part and the help I needed to replace the alternator myself!
July 5, 2017
Cheaper than Auto zone
This not my 1st time ordering yall and it probably wont be the last. Yall are cheap and good quality and fast shipping.
July 10, 2017
Good price, smooth installation
Installed in about 45 minutes, no issues. 2004 Nissan Altima.
July 10, 2017
Great price, but had a broken part
The alternator from 1AAuto was a great deal, and arrived quickly. We were able to install it ourselves until we realized that the new plastic piece that is part of the electrical output system was broken into pieces. We had to use the old alternators piece which caused us to blow the main fuse, and a mechanic had to help us to figure out how to adapt the old piece to the new alternator.
July 11, 2017
Alternator makes a lot of noise when a.c. is on and almost loses power to the point where the car almost turns off
August 6, 2017
Great product!
So far so good. My husband and his buddy removed the old alternator and installed the new one fast. Alternator fit perfectly and seems to be a good product.
August 18, 2017
2005 Nissan alternator replacement
As usual, 1aauto has the best in class prices and the installation videos are above and beyond. Thanks to 1aauto, I might be able to pay for my kids college instead of paying a mechanic for repairs. Thank you 1aauto!!.
September 13, 2017
Part great, Video helpful.
Part came in early. Working well. Video was helpful, but definitely not as easy as shown. Serpentine belt wrench is the way to go to create enough slack from the tension. Needed another set of hands to get belt over alternator. Overall, done in under an hour. Not bad for first time. Thanks, 1A.
September 22, 2017
Exact match as stated.
Upon reviewing the YouTube video it is important to make note that although the video advises to move the fuse block so the bottom bolt of the alternator can be extracted. In actuality you must also remove the fuse block mounting bracket as the bolt can not be extracted unless doing so. I used an off set 12mm to remove the 2 bolts and then the bracket it self and once the bracket was out of the way the alternator bolt easily came out and I was able to replace it. One last word of advise, it might be a wise investment to purchase a long 14mm wrench in order to take the pressure off of the tensioner pulley. I used a short wrench which is all I had with another long wrench over the end to give me additional leverage and quickly found out it was no easy task. Having a second set of hands to get the belt back on is the best advise I can offer as it was very difficult to get back on. In the end it all worked out and the battery light was no longer on. Car has been running perfect for almost 2 weeks.
September 25, 2017
Fast shipping
Arrived within 2 days. Ordered on Sunday and received Tuesday afternoon. Works like a champ.
October 27, 2017
Very impressed with quality and delivery, part was mew as advertised and was delivered fast! I will continue to shop here
October 29, 2017
Alternator installation
Thought your video was good. You should tell the customers in your video that a serpentine tool should be used to reinstall the serpentine belt.
November 18, 2017
2003 Nissan Altima
Excellent videos ,I was able to install without any issues. Will continue to be a customer , they have won me over.
February 12, 2018
Alternator makes a weird whining noise
I have just installed this along with a brand new idler pulley and serpentine belt so I have been able to narrow the noise to the alternator itself. It sounds like a super charger spooling. I did some research and it appears that these alternators do occasionally make this noise and it doesn’t harm the alternator it’s just annoying.
September 19, 2018
I be back
I love 1A auto they prices are very affordable and I got my part in 2 days, the only thing I dont like is the fact that they have a location about 30 min away from me and I cant pick my parts up, I would recommend 1a auto to others
September 21, 2018
Great product
Product just as advertised with perfect fit and fast shipping.
October 28, 2018
Fast and easy shopping
Got my alternator faster then expected was the exact fit and the instructions video and tool list made it for an easy change has been working great no problems would definitely recommend this site to everyone and for future uses
December 1, 2018
Will this fit my car? Add a vehicle to make sure
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Year Make Model Description
2002-2006Nissan Altima Nissan Altima Alternator L4 2.5L
2002-2006Nissan Sentra Nissan Sentra Alternator L4 2.5L
Part #: 1AEAL00411

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

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How-to Video:

(06:00 min)