2018 Nissan Altima Battery Size & Group

Quick Answer

• BCI Group Size: 24F
• CCA Rating: 600-720 CCA (minimum 600 CCA recommended)
• Reserve Capacity: 100-120 minutes
• AGM vs. Flooded: Either is acceptable, but verify your vehicle's original battery type if possible. AGM is generally recommended for its longevity and performance.
• Terminal Layout: Top post, typically positive on the right.
• Physical Dimensions: Approximately 10.25" (L) x 6.8" (W) x 9" (H).
• Dual-Battery Setup: Not applicable for this vehicle.

Replacement Battery Options

Here are some popular replacement options for your 2018 Nissan Altima:

• Interstate: MT-24F (Flooded), MTX-24F (AGM)
• Optima: Optima RedTop 34R (note: this is a slightly different group size but often fits with minor modifications and offers excellent performance)
• DieHard: DieHard Gold 24F, DieHard Platinum AGM 24F
• Odyssey: Odyssey PC1500DT (note: similar to Optima, a premium option that may require minor fitment adjustments)
• ACDelco: ACDelco Advantage 24F, ACDelco Professional 24F

Always double-check the fitment and specifications with your retailer before purchase.

AGM vs. Flooded — Which Does This Vehicle Need?

The 2018 Nissan Altima typically comes with a standard flooded lead-acid battery from the factory. However, newer vehicles are increasingly designed to benefit from the advanced technology of Absorbent Glass Mat (AGM) batteries. While a flooded battery will certainly work, an AGM battery offers several advantages that make it an excellent upgrade for your Altima.

AGM batteries are sealed, maintenance-free, and highly resistant to vibration. They also offer a faster recharge rate and superior performance in extreme temperatures. For vehicles with start-stop technology, extensive electronics, or those that spend a lot of time in challenging climates, an AGM battery is often the better choice due to its enhanced durability and deeper cycle capabilities. If your Altima has a lot of electronic accessories or if you want a battery with a longer lifespan and more consistent power delivery, an AGM is a worthwhile investment. If you're looking for a more economical option that performs adequately, a high-quality flooded battery will suffice.

Post-Installation Relearn / Reset Procedure

After disconnecting and replacing the battery in your 2018 Nissan Altima, you may experience some minor issues such as:

• Idle irregularity: The engine might run rough or have an inconsistent idle.
• Power window auto-up/down function not working: The one-touch up/down feature may be disabled.
• Radio presets lost: Stored radio stations will need to be reprogrammed.
• Clock reset: The time will need to be set.
• Navigation system recalibration: If equipped, the navigation system might need to locate its position.

Here's a common procedure to help reset these systems:

1. Idle Relearn (if needed): Drive the vehicle for approximately 10-15 minutes at various speeds, including some highway driving. The vehicle's computer should "relearn" the proper idle parameters during this time. If the idle is still rough, park the car and let it idle for 5-10 minutes without touching the accelerator.
2. Power Window Reset: Roll each window all the way down, then all the way up, holding the switch in the "up" position for a few seconds after the window is closed. Repeat for all windows.
3. Radio/Clock: Reprogram your radio presets and set the clock manually.
4. Steering Angle Sensor (if indicated): If your traction control light or steering wheel warning light is on, you may need a steering angle sensor reset. This often resolves itself after driving a short distance, but in some cases, it may require a scan tool to perform a calibration.

If any warning lights persist or if you have significant operational issues, it's best to consult your owner's manual or visit a qualified service technician.

Signs of a Failing Battery

Recognizing the signs of a dying battery can save you from being stranded:

• Slow Engine Crank: This is the most common symptom. The engine turns over sluggishly when you try to start the car.
• Dim Headlights/Interior Lights: If your lights appear dim, especially when the engine isn't running, it could indicate a weak battery.
• Check Engine Light: A failing battery can sometimes trigger the check engine light.
• Corrosion on Battery Terminals: Excessive white or blue-green powdery buildup on the battery terminals can impede current flow.
• Bloated or Swollen Battery Case: This often indicates an overcharged battery or internal damage and is a sign of immediate failure.
• Foul Odor: A smell of rotten eggs coming from the battery can indicate a leak or internal damage.
• Repeated Jump Starts: If you frequently need a jump start, your battery is likely at the end of its life.

Common Battery Issues for This Generation

While the 2018 Nissan Altima is generally reliable, some common themes can emerge with batteries for this generation of vehicle:

• Parasitic Draws: Even when turned off, modern vehicles can have small electrical draws that can slowly drain a battery, especially if the car sits for extended periods. This can be exacerbated by aftermarket accessories or electrical faults.
• Short Trips: Frequent short trips where the engine doesn't run long enough to fully recharge the battery can lead to premature battery wear.
• Extreme Temperatures: Both extreme heat and cold can degrade battery life. Hot climates can cause internal corrosion, while cold weather reduces the battery's cranking power.
• Unusual Electronics Demands: If your Altima has many power-hungry accessories or you frequently use them with the engine off, it can strain the battery more than usual.

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