What Size Battery Does a Hyundai Tucson Use?

Most modern Hyundai Tucson models use a 12‑volt Group 47 (H5) or Group 48 (H6) battery, depending on engine, model year, and whether the vehicle has start‑stop or hybrid technology; older models often use Group 124R/35 types. Choosing the right size means matching the physical dimensions, terminal layout, and electrical specifications (CCA and Ah) to your exact Tucson model and climate.

Understanding Battery Sizing for the Hyundai Tucson

The Hyundai Tucson has evolved through several generations, from conventional gasoline models to mild hybrids, full hybrids, and plug‑in hybrids. Each version places slightly different demands on the 12‑volt battery, which supports starting, electronics, and safety systems. While the main traction battery powers hybrid and plug‑in systems, a correctly specified 12‑volt battery remains critical to reliable operation.

Typical Battery Sizes by Hyundai Tucson Generation

Battery “size” involves group size (physical dimensions and terminal position), capacity (Ah), and cold‑cranking amps (CCA). Below is a generation‑by‑generation overview of common fitments; exact specifications may differ by region and trim, so it is always wise to confirm with the owner’s manual or VIN‑based lookup.

Fourth Generation (2022–Present, NX4: Gas, Hybrid, Plug‑in Hybrid)

The latest Tucson generation uses more advanced electrical systems, including stop‑start and high‑load electronics, which typically require higher‑capacity AGM batteries in some variants.

The following list outlines the most common 12‑volt battery group sizes and types used in the current Hyundai Tucson lineup.

• Gasoline models (2.5L and similar): Commonly Group 47 (H5) or Group 48 (H6); many markets now specify AGM (Absorbent Glass Mat) for stop‑start systems.
• Mild‑hybrid (where available): Often Group 48 (H6) AGM with higher CCA and reserve capacity to support frequent restarts.
• Full Hybrid (HEV): Typically a compact AGM 12‑volt battery (often H5/H6 style or similar footprint) supporting electronics while the high‑voltage pack manages propulsion.
• Plug‑in Hybrid (PHEV): Similar to the HEV, usually an AGM battery with specs tuned to higher electronic loads and less frequent use of the starter motor.

In practice, many fourth‑generation Tucsons will be compatible with both Group 47 and Group 48 batteries, but the correct group must match the tray, clamp, and cable reach; the original label or manual is the safest guide.

Third Generation (2016–2021, TL)

The third‑generation Tucson, widely sold in North America and Europe, standardized its battery sizes more than earlier models but still varied by engine and market.

This list summarizes the battery groups commonly fitted to third‑generation Hyundai Tucson models.

• 2.0L / 2.4L gasoline engines (North America): Often use Group 124R or Group 35 lead‑acid batteries; some later trim levels and stop‑start versions may specify AGM equivalents in the same group.
• 1.6T gasoline (with or without AWD): Frequently Group 47 (H5) or Group 48 (H6), especially in models with auto start‑stop.
• Diesel variants (Europe/other regions): Typically Group 47/48, or regionally equivalent DIN sizes (e.g., 60–72 Ah batteries) with higher CCA for cold starts.
• Stop‑start (ISG) models: Usually require EFB (Enhanced Flooded Battery) or AGM in the appropriate group size, not standard flooded batteries.

Owners of third‑generation Tucsons should pay particular attention to whether their vehicle has start‑stop, as fitting a non‑EFB/AGM battery in such systems can shorten battery life and affect performance.

Second Generation (2010–2015, LM/LM2)

Second‑generation Tucsons, often sold as the ix35 in some markets, tend to use more traditional flooded lead‑acid batteries, though climate and engine type still influence sizing.

The following list covers typical battery configurations found in second‑generation Tucson models.

• 2.0L / 2.4L gasoline engines: Commonly Group 124R or Group 35 in North America; DIN‑style 60–70 Ah units in Europe/Asia.
• Diesel engines: Generally higher capacity (e.g., 70 Ah or more) DIN‑style batteries to handle greater compression‑start demands.
• Non‑start‑stop systems: Standard flooded batteries are typically acceptable, with no AGM/EFB requirement unless specified by local market regulations or equipment packages.

Because electronics were simpler in this generation and start‑stop was less common, choosing a suitable replacement battery generally focuses on matching group size and ensuring adequate CCA for the local climate.

First Generation (2005–2009, JM)

Early Tucson models feature relatively modest electrical loads by today’s standards, which generally allows more flexibility in replacement batteries, as long as physical size and terminal layout match.

This list outlines the more common battery groups fitted to first‑generation Hyundai Tucson models.

• 2.0L / 2.7L gasoline engines: Often use Group 124R, Group 35, or their regional DIN equivalents (around 55–65 Ah).
• Diesel variants (where sold): Slightly higher capacity DIN batteries, often around 70 Ah, to support cold‑weather starting and glow‑plug loads.
• Electrical demands: No start‑stop systems; standard flooded lead‑acid batteries are usually sufficient unless the vehicle has heavy accessory use.

While battery choice is more forgiving in first‑generation models, confirming dimensions and terminal position remains critical to avoid cable strain or mounting issues.

Key Specifications to Match Beyond Physical Size

Even when the group size is correct, a Tucson’s performance and reliability depend on matching certain electrical specifications. The points below highlight the main figures owners should check when selecting a replacement battery.

• Cold‑Cranking Amps (CCA): Higher CCA helps start the engine in cold conditions; values typically range from about 550–800 CCA for modern Tucsons, with diesel and start‑stop models at the higher end.
• Amp‑Hour (Ah) capacity: Indicates how long the battery can sustain a load; 50–80 Ah is common depending on generation and equipment level.
• Battery technology:
  

  • Flooded lead‑acid: Standard in older and basic non‑start‑stop models.
  • EFB: Often specified in some start‑stop vehicles as an intermediate step between flooded and AGM.
  • AGM: Required or strongly recommended for many modern Tucson models with start‑stop, hybrid systems, or heavy electronic loads.

• Terminal layout and polarity: Must match the original (e.g., left‑positive/right‑negative) so cables reach without strain or crossing.

Matching these specifications ensures that a replacement battery not only fits in the tray but also delivers the necessary power and durability under real‑world driving conditions.

How to Identify the Correct Battery for Your Specific Tucson

Because trims, engines, and regional equipment differ, the most accurate way to confirm battery size is to check information specific to your exact vehicle. The steps below outline practical ways to do this without guesswork.

1. Consult the owner’s manual: Look for the “Specifications” or “Battery” section, which usually lists recommended capacity, CCA, and sometimes the size standard used in your region.
2. Read the existing battery label: The label typically shows group size (e.g., 47/H5, 48/H6, 124R, 35), CCA, Ah, and technology type (AGM, EFB, etc.).
3. Use VIN‑based lookup tools: Many dealer systems and large battery retailers allow you to enter your Vehicle Identification Number (VIN) to find compatible battery sizes.
4. Ask a Hyundai dealer or specialist shop: Dealers can access factory fitment data, which is particularly useful for hybrids and models with advanced driver‑assistance systems.
5. Check physical fit and mounting: Confirm that the new battery’s length, width, and height match the tray, that the hold‑down clamp can secure it properly, and that the hood will close without contact.

Using these methods together greatly reduces the risk of installing a battery that fits poorly, has insufficient output, or is incompatible with your Tucson’s electrical architecture.

Special Considerations for Hybrid and Plug‑In Tucson Models

Hybrid and plug‑in hybrid Tucsons add another layer of complexity, because a high‑voltage traction battery works alongside a conventional 12‑volt unit. The 12‑volt battery still plays a vital role in powering control units, safety systems, and initial startup routines.

The key considerations below highlight what owners of hybrid Tucson variants should keep in mind.

• Do not treat the 12‑volt battery as optional: Even when the traction battery is healthy, a weak 12‑volt unit can prevent the vehicle from “booting up” or going into Ready mode.
• AGM is usually mandatory: Most full‑hybrid and plug‑in Tucson models specify AGM batteries for their improved cycle life and stability under deep‑discharge conditions.
• Charging behavior is different: The hybrid system manages charging via DC‑DC converters rather than a conventional alternator, so using the specified battery type helps avoid premature wear.
• Location may differ: In some hybrid models, the 12‑volt battery may be located in the cargo area or under seats rather than in the engine bay, affecting size and terminal orientation.

Because of these differences, hybrid and plug‑in Tucson owners should be particularly strict about following Hyundai’s specifications or dealer guidance when selecting a replacement 12‑volt battery.

Cost, Brands, and Replacement Strategy

Battery technology and group size significantly influence price and replacement intervals. Understanding these factors helps Tucson owners budget sensibly and reduce the risk of unexpected failures.

The following points summarize typical cost ranges and decision factors when choosing a replacement battery for a Hyundai Tucson.

• Price ranges:
  

  • Standard flooded Group 124R/35 batteries: often in the lower price bracket.
  • Group 47/48 EFB batteries: mid‑range pricing.
  • AGM Group 47/48 batteries for start‑stop or hybrid models: higher initial cost but longer service life.

• Brand considerations: Well‑known brands (e.g., OEM Hyundai, major global battery manufacturers) typically offer better warranties and more consistent quality.
• Warranty length: Many replacement batteries offer 2–4‑year warranties; choosing a longer‑warranty product can be cost‑effective if you plan to keep the vehicle.
• Preventive replacement: In harsh climates, replacing a 4–5‑year‑old battery before winter can avoid no‑start situations, especially in start‑stop and hybrid Tucsons.

Factoring in both upfront price and expected lifespan helps owners select a battery that delivers reliable service without overspending for unused capacity.

Summary

Most Hyundai Tucsons use 12‑volt batteries in Group 47 (H5), Group 48 (H6), or older groups such as 124R/35, with newer, start‑stop, hybrid, and plug‑in models increasingly requiring AGM or EFB technology. The precise size and specification depend on the vehicle’s generation, engine, market, and equipment level.

To identify the correct battery for any particular Tucson, owners should check the owner’s manual, read the label on the existing battery, or use a VIN‑based lookup through a dealer or reputable retailer. Matching group size, CCA, Ah rating, and technology type—especially for start‑stop and hybrid systems—ensures reliable starting, protects electronic systems, and maximizes battery life.