What Size Battery Is in a 2011 Hyundai Sonata?

The typical replacement battery size for a 2011 Hyundai Sonata is a Group 124R or Group H5 (also known as 47/H5), depending on engine and market, with most U.S. gasoline models commonly using a 124R battery rated around 550–700 cold-cranking amps (CCA). However, actual fitment can vary by trim, original equipment, and regional specification, so checking the existing battery label or your VIN is essential before buying.

Understanding the 2011 Hyundai Sonata Battery Specification

The 2011 Hyundai Sonata spans several trim levels and engine options, and over time many cars have had their batteries replaced with different equivalent types. That can cause confusion for owners trying to identify the “correct” size. In practice, battery “size” usually involves the BCI group number, physical dimensions, terminal layout, and electrical ratings such as CCA and reserve capacity. For most U.S.-spec 2011 Sonatas with gasoline engines, the original-equipment style is close in size to a Group 124R or, in some catalogs, an H5/47-style battery.

Common Battery Group Sizes for the 2011 Hyundai Sonata

While Hyundai’s original supplier and part numbers may differ, replacement batteries are usually specified by standardized group sizes. These groups determine whether the battery will physically fit in the tray, align with the hold-down, and allow the cables to reach correctly.

• Group 124R – Commonly listed for many 2011 Sonata trims in North America; reverse terminal orientation (“R”) with dimensions around 10.25" x 6.8" x 8.9" (approx. 260 x 173 x 225 mm).
• Group H5 / 47 – A European “H” size that many parts catalogs show as interchangeable for the Sonata; dimensions roughly 9.5" x 6.9" x 7.5" (approx. 242 x 175 x 190 mm).
• Group 35 (less common) – Some aftermarket installations and regional markets use Group 35 batteries, especially where the tray and clamps have been adapted or replaced; dimensions about 9.1" x 6.9" x 8.9" (approx. 230 x 175 x 225 mm).

In practice, the 124R and H5/47 groups are the most frequently recommended for the 2011 Sonata in parts-store fitment guides, but verifying against your vehicle’s tray and cable reach is key to avoiding installation and clearance issues.

Recommended Electrical Ratings

Beyond physical size, it is crucial to match or exceed the electrical performance of the original battery. This affects cold-weather starting reliability, especially as the Sonata’s electrical load has increased with features such as heated seats, infotainment systems, and electronic control units.

• Cold-Cranking Amps (CCA): Typically in the 550–700 CCA range for gasoline 2011 Sonatas; higher CCA offers better starting performance in cold climates.
• Reserve Capacity (RC): Commonly in the 90–120-minute range; more RC helps support electronics if the alternator output is low or during short-trip use.
• Voltage: Standard 12-volt lead-acid automotive battery.
• Technology type: Standard flooded lead-acid is adequate for most trims, while AGM (Absorbent Glass Mat) is an upgrade option that can better tolerate heavy accessory use and frequent short trips.

Matching or slightly exceeding the factory CCA and reserve capacity gives a margin of safety without causing compatibility issues, and many owners choose AGM variants for better durability, provided the size and terminal layout match.

Engine and Trim Considerations

The 2011 Sonata lineup includes different engines—typically a 2.4L naturally aspirated four-cylinder and a 2.0L turbocharged four-cylinder in performance-oriented trims. While both engines can often use the same battery group, trim-level options and equipment load can influence ideal specifications.

• 2.4L non-turbo models: Commonly paired with Group 124R or H5/47 batteries with around 550–650 CCA; most standard SE/GLS trims fall in this category.
• 2.0L turbo models: Sometimes specified with slightly higher CCA batteries (in the upper 600s); still usually within the same physical group size but with more robust internals.
• High-feature trims (Limited, options packages): With more electronic features, these benefit from batteries with higher reserve capacity or AGM construction to cushion electrical demand.

While the physical group size is often identical across trims, considering engine type and electrical load helps fine-tune the ideal CCA and reserve capacity for your specific Sonata configuration.

How to Confirm the Correct Battery for Your Sonata

Because part catalogs, dealer replacements, and prior owner choices can all differ, the most reliable method is to confirm directly with your vehicle and official references, then cross-check with reputable retailers.

1. Check the existing battery label: Look for the group size (e.g., “124R” or “H5/47”), CCA rating, and RC. Note terminal orientation and physical dimensions.
2. Consult the owner’s manual: Hyundai typically provides battery capacity information (Ah rating in some markets) and may specify recommended or minimum CCA values.
3. Use the VIN at a dealer: A Hyundai dealer can look up the exact original-equipment specification based on your vehicle identification number.
4. Compare measurements to the tray: Measure length, width, and height, and verify that the hold-down clamp and cables will fit the proposed replacement.
5. Check reputable parts catalogs: Major chains such as AutoZone, O’Reilly, NAPA, Advance Auto Parts, and battery brands like Interstate, DieHard, and Bosch provide online fitment tools for the 2011 Sonata.

Cross-referencing these sources minimizes the risk of buying a battery that does not fit securely, has reversed terminals relative to your cables, or fails to meet Hyundai’s original performance specifications.

Practical Buying Tips for a 2011 Sonata Battery

Once you know the appropriate group size and basic ratings, choosing a specific battery model comes down to quality, warranty, and how you drive. Some owners prioritize cost, while others prefer long-term reliability.

• Opt for a well-known brand: Established manufacturers typically offer more consistent quality control and clearer warranty support.
• Consider climate: In very cold regions, prioritize higher CCA; in hot climates, focus on heat-resistant construction and strong warranties.
• Look at warranty terms: Full replacement periods of 2–3 years with additional prorated coverage are common for mid- to high-tier batteries.
• Decide between flooded and AGM: AGM costs more but may last longer and handle deep discharges better, useful for frequent short trips and heavy accessory use.
• Verify terminal style and position: The 124R “R” orientation and H5/47 equivalents must allow the positive and negative cables to reach correctly without strain.

Balancing cost against performance and warranty coverage helps ensure your Sonata gets a battery that not only fits but also stands up to your particular driving and climate conditions.

Summary

For most 2011 Hyundai Sonata models in North America, the commonly recommended replacement battery size is a Group 124R or Group H5/47, with typical ratings in the 550–700 CCA range and around 90–120 minutes of reserve capacity. However, variation in engine type, trim level, and previous replacements means owners should always verify the existing battery’s group size and ratings, check the owner’s manual or dealer records, and confirm fitment in the tray before purchasing. Matching the correct physical size, terminal layout, and adequate electrical performance will ensure reliable starting and long-term durability for your 2011 Sonata.