2021 Toyota Tacoma Battery: Group Size, CCA & Replacement Options

Quick answer

• BCI Group Size: 24F
• Cold Cranking Amps (CCA): 582 CCA (standard); 750+ CCA recommended for aftermarket upgrades, especially in cold climates.
• Reserve Capacity (RC): Approximately 130 minutes.
• Battery Type: Standard flooded lead-acid. AGM is an optional upgrade.
• Terminal Layout: Right-hand positive (+)
• Physical Dimensions (approximate): 10.25" L x 6.81" W x 8.88" H
• Dual-battery setup: Not applicable; the Tacoma does not have a diesel option.

Replacement battery options

For the V6 and 4-cylinder 2021 Toyota Tacoma, a BCI Group 24F battery is the direct OEM fit. When choosing a replacement, you can opt for a standard flooded battery like the original or upgrade to an AGM (Absorbent Glass Mat) for better performance and longevity.

Here are a few popular replacement options:

• Interstate MT-24F: A common and reliable flooded lead-acid replacement.
• Optima YellowTop DH6: A high-performance AGM battery, ideal for vehicles with significant electrical demands (e.g., aftermarket lights, winch, audio systems).
• DieHard Gold 24F: A quality flooded lead-acid battery available at most Advance Auto Parts stores.
• Odyssey Performance 24F-720: A premium AGM battery with excellent cranking power and a long service life.
• ACDelco Gold 24F: A trusted OEM-quality replacement.

AGM vs flooded — which does this vehicle need?

The 2021 Toyota Tacoma comes from the factory with a standard flooded lead-acid battery. This type of battery is perfectly adequate for most users and is the more budget-friendly option. However, an AGM battery can be a worthwhile upgrade for several reasons:

• Durability: AGM batteries are more resistant to vibration than flooded batteries. This is a significant advantage for a truck like the Tacoma, which is often used for off-roading and on rough terrain.
• Performance: AGM batteries generally have a higher reserve capacity and can handle deep cycling better than their flooded counterparts. If you frequently use electronics in your truck with the engine off, an AGM is a better choice.
• Safety: Because the electrolyte in an AGM battery is absorbed in glass mats, they are spill-proof and can be mounted in a wider range of positions.

Ultimately, while the 2021 Tacoma does not require an AGM battery, it's a recommended upgrade for those seeking improved performance and durability, especially for off-road enthusiasts or those living in extreme climates.

Post-installation relearn / reset procedure

Fortunately, the 2021 Toyota Tacoma does not require a complex battery relearn procedure. Unlike some modern vehicles that need a scan tool to register the new battery with the vehicle's computer, the Tacoma is relatively straightforward.

After replacing the battery, you may notice that the idle is a bit rough for the first few minutes of driving. This is normal. The engine control unit (ECU) is simply relearning the fuel trims. The issue will resolve itself after a few minutes of driving. You may also need to reset your radio presets and clock.

Signs of a failing battery

• Slow engine crank: This is the most common sign of a weak battery. The engine will sound sluggish when you try to start it.
• Dimming lights: If you notice that your headlights and interior lights dim when you start the engine, it's a sign that the battery is struggling to provide enough power.
• Warning light: The battery light on your dashboard may illuminate if the vehicle's charging system detects a problem with the battery.
• Visible corrosion: A white or bluish powder around the battery terminals is a sign of corrosion, which can impede the flow of electricity.

Common battery issues for this generation

The third-generation Tacoma (2016-present) has a well-documented issue with its charging system. Some owners have reported that the alternator does not sufficiently charge the battery, leading to premature failure. This is particularly noticeable for those who take frequent short trips, as the battery never has a chance to fully recharge. Upgrading to an AGM battery with a higher reserve capacity can help mitigate this issue. Some owners also opt for a voltage booster to ensure the battery receives a full charge.

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