2015 Nissan Altima Battery Size & Group

Quick Answer

• BCI Group Size: 24F
• CCA Rating (minimum): 550 CCA
• Reserve Capacity (minimum): 90-100 minutes
• AGM vs. Flooded: Flooded (AGM upgrade possible)
• Terminal Layout: Top Post, Positive on Right (when viewed from front of vehicle)
• Physical Dimensions: Approximately 10.25" L x 6.8" W x 9" H

Replacement Battery Options

• Interstate: MT-24F
• DieHard: 38217 (Gold 24F)
• ACDelco: 24F Advantage

AGM vs. Flooded — Which Does This Vehicle Need?

The 2015 Nissan Altima originally came equipped with a flooded lead-acid battery from the factory. A flooded battery is perfectly adequate for the vehicle's electrical demands and is often the most economical choice. However, you can absolutely upgrade to an Absorbent Glass Mat (AGM) battery if you desire.

AGM batteries offer several advantages:

• Improved Durability: They are more resistant to vibration and impacts, making them last longer in some conditions.
• Slower Self-Discharge: They hold a charge longer when the vehicle isn't in use.
• Better Performance in Extreme Temperatures: They tend to perform better in both very cold and very hot climates.
• Maintenance-Free: No need to check electrolyte levels.

While an AGM battery is a great upgrade, it's not strictly required for your 2015 Nissan Altima. If you opt for an AGM, ensure it's the correct BCI Group Size (24F) and has equivalent or better CCA and Reserve Capacity ratings.

Post-Installation Relearn / Reset Procedure

After replacing the battery in your 2015 Nissan Altima, you may experience a few minor issues that can be resolved with a simple reset procedure. This is because disconnecting the battery can clear the vehicle's onboard computer (ECU) adaptations.

Here's a common procedure:

1. Install the New Battery: Ensure all connections are clean and tight.
2. Idle Relearn: Start the engine and let it idle for at least 10 minutes without touching the accelerator. This allows the ECU to relearn the engine's idle parameters.
3. Power Window Reset (if necessary): If your automatic windows are not functioning correctly (one-touch up/down), roll each window all the way down, then roll it all the way up and hold the switch in the "up" position for a few seconds after it's closed. Repeat for all windows.
4. Radio/Navigation: You may need to re-enter any security codes for your radio or navigation system and reprogram your preset stations.
5. Clock: Reset the clock to the correct time.

If you experience any persistent warning lights (e.g., "Service Engine Soon," "ABS," "Traction Control") after the battery replacement and reset procedure, it's recommended to have your vehicle scanned by a professional to diagnose any potential issues.

Signs of a Failing Battery

Recognizing the signs of a dying battery can save you from being stranded. Here are the common indicators:

• Slow Engine Crank: The most obvious sign. The engine turns over sluggishly when you try to start the car.
• Dim Headlights/Interior Lights: When the engine is off, if your lights appear dim, it indicates a weak battery.
• Warning Lights: A battery warning light on your dashboard is a clear indicator.
• Corrosion: White or blue powdery substance around the battery terminals can indicate a leak or poor connection, often a symptom of an aging battery.
• Swollen Battery Case: If the battery case looks swollen or bloated, especially on the sides, it's a sign of internal damage and overheating.
• Age: Automotive batteries typically last 3-5 years. If your battery is older than this, it's wise to have it tested.

Common Battery Issues for This Generation

The 2013-2018 Nissan Altima generation is generally reliable when it comes to its charging system, but like any vehicle, battery-related issues can arise:

• Parasitic Draws: Sometimes, an electrical component in the vehicle can remain on or draw a small amount of power even when the car is off, slowly draining the battery over time. This can be challenging to diagnose but might manifest as a dead battery after leaving the car parked for a few days.
• Alternator Issues: While not directly a battery issue, a failing alternator won't properly charge the battery, leading to repeated dead batteries. If your new battery dies quickly, have your alternator tested.
• Terminal Corrosion: While common in all cars, consistent corrosion on the terminals of your Altima's battery can impede current flow and lead to starting problems. Regular cleaning and anti-corrosion sprays can mitigate this.
• OEM Battery Lifespan: Some owners have reported that the original factory-installed batteries might have a slightly shorter lifespan compared to aftermarket replacements, especially in extreme climates. Always opt for a reputable brand when replacing.

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