What Size Battery Is in the 2014 BMW 435i?

The 2014 BMW 435i typically uses a Group 94R (H7) 12‑volt battery, most commonly in an AGM (Absorbent Glass Mat) configuration, with around 80–95 Ah capacity and approximately 800 CCA (Cold Cranking Amps), depending on market, trim, and original equipment. Below is a detailed breakdown of battery specifications, variations, and what to know when replacing it.

Understanding the Battery Type and Size

The 2014 BMW 435i, part of the F32/F33/F36 4 Series generation, relies on a high-capacity battery designed to work with BMW’s advanced electronics, including start/stop systems and energy management. Knowing the correct group size, chemistry, and ratings is essential for ensuring proper fit and reliable performance.

Standard Battery Group Size and Physical Dimensions

Most 2014 BMW 435i models are equipped from the factory with a Group 94R (also known as H7) battery. This is a standardized size that determines the physical dimensions and terminal placement of the battery.

This list outlines the key physical characteristics of the Group 94R (H7) battery used in the 2014 BMW 435i, helping owners verify that a replacement will physically fit and connect correctly.

• BCI Group Size: 94R (H7 in EN sizing)
• Approximate Dimensions: about 12.4 in (315 mm) length, 6.9–7.0 in (175–178 mm) width, 7.5 in (190 mm) height
• Terminal Orientation: “R” indicates reversed terminals; positive terminal is typically on the right when the posts are closest to you
• Mounting Location: In the trunk, usually on the right side under the floor trim panel

Because BMW uses standardized group sizes, choosing a Group 94R/H7 battery with the correct dimensions and reversed terminal layout ensures a proper fit in the original tray and secure mounting in the trunk compartment.

Typical Capacity, CCA, and Chemistry

Beyond physical size, performance specs such as amp‑hour (Ah) capacity and Cold Cranking Amps (CCA) are crucial, especially for a vehicle with the electrical demands of a modern BMW. The 2014 435i often shipped with an AGM battery designed for higher cyclic durability.

The following list highlights the typical electrical specifications and chemistry of the original or recommended replacement battery for a 2014 BMW 435i, giving a clear sense of the performance envelope required.

• Voltage: 12 V
• Chemistry: AGM (Absorbent Glass Mat) is most common and generally recommended
• Amp‑hour (Ah) Capacity: commonly in the 80–95 Ah range for OEM and quality aftermarket units
• Cold Cranking Amps (CCA): typically around 760–900 CCA, depending on brand and specific model
• Reserve Capacity (RC): often in the 140–160 minute range (varies by manufacturer)

While exact numbers differ among brands, sticking to an AGM 94R/H7 battery in the original capacity range ensures that the car’s start/stop system and extensive electronics have sufficient power and durability.

Why BMW Commonly Uses AGM Batteries in the 435i

AGM batteries have become standard in many BMW models by the mid-2010s, including the 435i, because they better support the high electrical load and frequent cycling associated with modern features like auto start/stop, electric power steering, and advanced infotainment.

Advantages of AGM in a 2014 435i

There are several reasons BMW specifies AGM batteries for vehicles like the 2014 435i, especially when equipped with additional electrical options and EfficientDynamics features.

This list summarizes the main benefits of AGM technology in the context of a 2014 BMW 435i, clarifying why matching the original battery type is more than just a formality.

• Better cycling performance: With start/stop and frequent restarts, AGM handles repeated discharge and recharge better than standard flooded batteries.
• Higher power density: AGM delivers more cranking power for its size, supporting cold-weather starts and power-hungry accessories.
• Lower internal resistance: Allows faster recharging by the alternator and more efficient power delivery.
• Spill- and leak-resistance: Important for trunk-mounted batteries in case of impacts or tilting.
• Compatibility with energy management: The car’s intelligent charging system is calibrated with AGM characteristics in mind.

While some owners consider switching to a conventional flooded battery to save money, deviating from AGM can reduce battery life and interfere with BMW’s energy management strategies over time.

OEM vs. Aftermarket Variations

Exact specifications can vary slightly depending on whether the battery is original BMW-branded equipment or an aftermarket replacement from manufacturers such as Exide, Varta, Bosch, Interstate, DieHard, or others. However, they typically remain within a narrow performance and size range.

Common OEM-Equivalent Battery Specs

Although part numbers differ across regions and suppliers, most OEM-equivalent units share broadly similar characteristics that meet BMW’s requirements for the 2014 435i.

This list provides a generalized snapshot of what you can expect if you choose a high-quality OEM-equivalent 94R/H7 battery for your 2014 BMW 435i.

• Group Size: 94R / H7
• Chemistry: AGM (strongly preferred, often factory-standard)
• Capacity: around 90 Ah (commonly 80–95 Ah depending on supplier)
• CCA Rating: typically around 800 CCA (±100 CCA)
• Branding: BMW-branded batteries often come from major OEM suppliers such as Exide or Varta

These minor differences between aftermarket and BMW-branded batteries usually have no negative impact as long as the group size, chemistry, and general capacity range are correct and the battery is properly registered to the car.

Importance of Battery Registration in a BMW 435i

On BMW models like the 2014 435i, simply swapping the battery without updating the vehicle’s software can lead to charging and longevity issues. BMW uses a battery management system that tracks battery age, type, and capacity to adjust charging behavior.

What Battery Registration Does

Battery registration is a software procedure carried out via BMW diagnostic tools or compatible aftermarket scanners. It tells the car a new battery has been installed and, if needed, that its specifications have changed.

The following points explain the purpose and impact of battery registration in the 2014 BMW 435i, emphasizing why this step is as important as choosing the correct physical battery size.

• Resets battery age data: The car stops assuming the battery is old and adjusts its charging strategy accordingly.
• Aligns charging profile: Ensures alternator output is tailored to the new battery’s type and capacity (especially important when changing between different Ah ratings or chemistries).
• Prevents overcharging or undercharging: Helps avoid shortened battery life caused by mismatched charging behavior.
• May clear related fault codes: Can resolve battery-related warnings or power management messages.

Many independent shops and BMW specialists can perform battery registration; some capable DIY owners use tools like ISTA, Carly, BimmerLink, or other compatible OBD apps and interfaces to handle the process themselves.

How to Confirm the Exact Battery Specs on Your 2014 435i

While Group 94R/H7 AGM is the prevalent configuration, equipment levels, markets (U.S., Europe, etc.), and previous replacements may lead to subtle variations. Confirming what is currently installed helps avoid surprises and ensures a like-for-like or properly upgraded replacement.

Steps to Check Your Existing Battery

Verifying your car’s current battery only requires basic access to the trunk and attention to the labels on the existing unit. This can be done before ordering a replacement or scheduling service.

This list walks through simple steps an owner can take to identify the current battery’s key specifications on a 2014 BMW 435i.

• Access the battery compartment: Open the trunk, lift the floor panel, and remove any cover over the battery on the right side.
• Read the label: Look for markings such as “AGM,” “94R,” “H7,” and ratings like Ah (e.g., 90Ah) and CCA (e.g., 800A).
• Note the brand and part number: BMW-branded batteries have specific part numbers that can be cross-referenced with dealer or parts catalogs.
• Check date codes: Some labels show a manufacture date or code, which can indicate battery age.
• Take a photo: Photograph the label for easy reference when consulting parts suppliers or searching online.

Once you have this information, you can match the original specifications closely or choose a slightly higher-capacity AGM battery within the same group size, then ensure proper software registration after installation.

Key Takeaways for 2014 BMW 435i Owners

For most owners, the crucial point is that the 2014 BMW 435i uses a trunk-mounted, Group 94R (H7) 12‑volt AGM battery with roughly 80–95 Ah capacity and around 800 CCA, and any replacement should match those fundamentals and be correctly registered with the car’s electronic systems.

Summary

The 2014 BMW 435i is typically equipped with a Group 94R (H7) 12‑volt AGM battery, positioned in the trunk and offering around 80–95 Ah and about 800 CCA, depending on brand and market. Choosing a replacement that matches this group size, AGM chemistry, and similar capacity ensures proper fit and performance. Because the vehicle uses an intelligent battery management system, any new battery—especially if its specifications change—should be electronically registered so the car can adjust its charging strategy, maximize battery life, and maintain reliable operation of all electrical systems.

What kind of battery does a 2014 BMW 435i take?

Super Start Platinum AGM Top Post Battery Group Size 49 H8 850 CCA 170 Minute RC – 49PLT.

What size battery is in the 2015 BMW 435i?

Duralast Platinum Group Size 49 H8 AGM Battery H8 AGM.

What type of battery does my BMW use?

BMWs use one of three types of car battery: Lead-acid, GEL or Absorbent Glass Mat (AGM). Each one operates differently, will have different pros and cons while in use, and should even be installed and handled in different ways.

What kind of battery does a 435i take?

For your BMW 435i, options like the Group Size H6 and H8 are typically recommended, providing the reliability and performance required for such a sophisticated machine. Whether you prefer traditional lead-acid or advanced AGM batteries, AutoZone has the right fit for your vehicle.