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What is the battery size of a Honda Civic?

There is no single battery size that fits every Civic. For most modern non-hybrid Civics, the standard 12-volt auxiliary battery is supplied in one of a few common group sizes, most often 51R or 35, but the exact size depends on the model year, engine, and trim. Hybrid Civics and special editions may use different configurations for the 12V system, while the high-voltage hybrid battery is a separate component. This article explains the typical sizes and how to verify the exact size for your car.

This article details the typical battery group sizes used across Honda Civics, how to identify which size your specific vehicle requires, and what to check when replacing a battery—from the label on the battery to official Honda documentation and VIN-based parts catalogs.

Common battery group sizes for non-hybrid Civics

What the numbers mean for your car

Before listing the common options, note that “group size” refers to the battery's physical dimensions, terminal layout, and fitment, not to the chemistry or capacity alone. The appropriate size can vary by generation, market, and trim.

Group 51R is widely used in many Honda Civics from multiple generations. It typically supports standard starting power in everyday use and is a common aftermarket option.

Group 35 is another frequent option, offering similar width but different length/height with adequate cold-cranking amps for many Civics, depending on the exact model year and trim.

Other nearby group sizes such as 42R or 24F appear in certain markets or configurations, but are less common for standard, factory-recommended Civics.

Conclusion: For most modern, non-hybrid Civics, the 12-volt battery you’ll encounter in the replacement market is typically in the 51R or 35 group, with CCA ratings commonly in the 400–500 range depending on the exact unit. Always verify the exact group size and CCA on the existing battery or via official documentation.

How to verify the exact size for your Civic

Steps to identify the correct battery for your model

Before listing: To ensure you purchase the right battery, confirm the exact group size using the vehicle’s documentation or the current battery’s labeling. This reduces the risk of fitment or performance issues.

Check the battery label: The Group Size should be printed along with the cold-cranking amps (CCA) and other specs on the battery's top or side.

Consult the owner's manual or Honda dealer: The manual lists the recommended group size for your Civic's generation and trim. A dealer's parts counter can look up your VIN.

Use the VIN in the official parts catalog: Honda’s online parts database or a dealership can confirm the exact compatible battery for your car.

Conclusion: Verifying the group size with the label or official documentation ensures you get a battery that fits properly and meets the car’s electrical requirements.

Hybrid and high-voltage considerations

How the 12V battery works in a Civic Hybrid

Before listing: If you own a Civic Hybrid or Sport/Si variant, the 12V battery remains essential for starting and electronics, while a high-voltage battery pack powers propulsion. The 12V size and placement can differ from non-hybrid Civics, but steps to verify remain similar.

Hybrid Civics use a 12V battery for accessories and system control modules; the group size varies by year and regional market.

Some newer hybrids use AGM (absorbent glass mat) 12V batteries for improved durability and performance in hybrid systems.

When replacing, use the OEM-recommended 12V battery size for your Civic Hybrid to avoid compatibility issues with the vehicle’s electrical architecture and start-up sequence.

Conclusion: For Civics with hybrid powertrains, check the 12V battery size in the owner’s manual or dealer parts catalog, as it can differ from gasoline-only Civics and may include AGM construction in recent generations.

Summary

The Honda Civic does not have a single universal battery size. For most non-hybrid Civics, the common 12-volt battery sizes are Group 51R or Group 35, with variations depending on year, trim, and market. Hybrid Civics keep a 12V battery that supports electronics, but the exact group size may differ from gasoline-only models. Always verify the exact group size and specifications using the current battery label, the owner’s manual, VIN-based parts catalogs, or a Honda dealer to ensure proper fit and performance.

What size battery group is a 2012 Honda Civic?

51R
Optima Yellow AGM SAE - Type A Battery Group Size 51R 450 CCA 66 Minute RC - YEL51RSO. Weight (Lbs): 26 Lbs.

What size battery for a 2016 Honda Civic?

A 2016 Honda Civic requires a BCI group size 51R battery. This size has a top-right positive terminal and a top-left negative terminal. When replacing the battery, it is important to get a 51R size, and verify that the positive and negative terminals are on the correct sides to match the cables in your vehicle, as some Reddit users noted that some batteries with the same group number may have a different orientation.
What you need to know

Battery Size: The standard BCI group size is 51R.
Terminal Location: The positive terminal is on the right and the negative is on the left.
Consideration: While the group size should be correct, it's recommended to confirm the positive and negative terminal orientation on the new battery to ensure the cables will reach.
Upgrades: If your vehicle has added electrical accessories, you may want to consider upgrading to a higher-performance battery, such as an AGM battery, but always ensure it's a 51R size.

Which battery is best for a Honda Civic?

The best battery for a Honda Civic depends on your priority: for reliability and value, Interstate batteries from Costco are a popular choice due to their good balance of price, performance, and warranty. For those seeking a high-performance option, AGM batteries like the XS Power D5100R or Antigravity Group 51R offer benefits like better performance in cold weather and higher power output. For the most affordable option with a good warranty, Walmart's Everstart Max is often recommended.
Top recommendations for a Honda Civic battery
Best overall value

Interstate: Frequently recommended for its durability and consistent performance.
Costco: Sells Interstate batteries at a competitive price and offers excellent customer service for warranty claims.

High-performance options

AGM batteries: A good upgrade for most models, especially those in cold climates, as they offer better power and reliability.
XS Power D5100R: A premium AGM battery with a high cranking amp rating and suitability for cold climates.
Antigravity Group 51R: A lightweight option with a high cranking amp rating, ideal for those looking for performance and weight savings.

Budget-friendly option

Everstart Max: A popular budget-friendly choice, often available with a good warranty.

Factors to consider

Battery Type: For most Civics, a Group Size 51R battery is the correct fit, but for 2022 and newer models, the H5 size is used. Always check your owner's manual for the correct size.
Cold Cranking Amps (CCA): This measures a battery's ability to start a car in cold weather. A higher CCA is better for cold climates.
Warranty: Consider the length and terms of the warranty. Batteries with a longer warranty period, like 3 years or more, are a good investment.
Budget: Decide on a budget and choose the best option that fits within it.
Driving Conditions: If you live in a cold climate, an AGM battery is a great option for better cold-weather performance.
Performance needs: If you have upgraded your car's electrical system, a high-performance AGM or lithium battery is a good choice.

What size battery for Honda Civic?

The correct Honda Civic battery size varies by model year, with common sizes including Group 51R for many standard models and Group 47 (H5) for newer and some performance models. Always verify your specific vehicle's battery size by checking your owner's manual or using a parts finder with your car's year, make, and model to ensure compatibility and avoid physical fitment issues.

Common battery sizes by model

Group 51R: This is the most common size, used in many Honda Civics for decades. It is an exact fit for many standard models and is relatively easy to find.
Group 47 (H5): This size is common in newer models, particularly those with the 2.0-liter engine. It is also known as H5 and is used in certain 2016 and newer Civics.
Group 51: Some older models, like the 2001 Civic, originally came with this odd-shaped battery, though a 51R is often a compatible alternative.

How to confirm the correct size

Check your owner's manual: This is the most reliable source for your vehicle's specific battery requirements.
Use an online parts finder: Many auto parts websites have tools that allow you to enter your vehicle's year, make, and model to find compatible batteries. Look for group sizes like 51R or 47 (H5).
Visually inspect the old battery: Note the size and group number printed on your current battery for a direct comparison.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.