How To: Replace an Alternator in a 2013 to 2018 Nissan Altima
This guide will walk you through the alternator replacement process for a 2014 Nissan Altima, and are also applicable to most 2013, 2015, 2016, 2017, and 2018 Nissan Altima models with a 2.5L engine. Replacing a worn or failing alternator ensures your vehicle’s electrical system works efficiently, allowing your electrical accessories, headlights, dashboard lights, and battery to perform as they should. If you’ve noticed issues like dimming lights or a battery that struggles to hold a charge, stop by your local O’Reilly Auto Parts for free alternator testing and free battery testing to help you begin your diagnosis and repairs.
Supplies Needed for This Job:
0:00 Welcome Back
0:35 Loosen and Detach the Negative Battery Cable
0:45 Remove Engine Cover
1:00 Remove Cable Mounting Nut
1:14 Loosen the Lug Nuts and Remove Wheel Cover
1:24 Chock Rear Wheels and Support Front End
1:34 Remove Passenger-Side Wheel
1:45 Remove Panel from Wheel Well
2:01 Remove Serpentine Belt
2:13 Remove Alternator Mounting Bolts
2:25 Remove Alternator from Engine Bay
2:38 Install New Alternator
3:00 Replace Cable Mounting Nut
3:20 Replace Serpentine Belt
3:50 Replace Panel on Wheel Well
4:00 Slide Wheel Back into Place
4:10 Lower Front End and Remove Wheel Chocks.
4:20 Torque Lug Nuts to 83 foot-pounds and Snap Wheel Cover
4:30 Replace Engine Cover
Your Nissan Altima’s alternator helps keep your vehicle running by charging the battery and powering electrical accessories and ignition or engine management system when the engine is on. If the alternator fails, your Nissan’s electrical systems will rely solely on the battery’s reserve capacity until it is depleted, potentially causing the engine to stall and leaving your vehicle inoperable. A damaged alternator can also overcharge, damaging the battery and other electrical components. Though jump-starting your car might help temporarily, replacing a failing alternator promptly will help keep your Altima's electrical systems functioning reliably.
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Park on a level surface… and open the hood.
Use your ratchet and a 10mm socket to loosen and detach the negative battery cable.
Use a 5mm hex bit socket, and possibly an extension, to remove the three bolts securing the engine cover.
Grip the cover by its outside edges closest to the windshield… and pull straight up on it to disengage the tab at the top…then remove the cover.
Locate your alternator, which is toward the front of the engine bay on the passenger side, and move aside the boot covering the positive cable mounting nut.
Use your ratchet and 12mm socket with extension to remove the nut.