What battery does a 2002 BMW 325i need?

A 2002 BMW 325i uses a 12-volt, maintenance-free lead-acid battery. Replacement units are commonly around 90 amp-hours (Ah) with roughly 680–730 cold-cranking amps (CCA). The most common physically fitting size for many E46 325i models is Group 49 (also sold as H7), but you should verify the exact fit by checking your current battery label or the owner's manual.

Battery basics for the 2002 BMW 325i

Notes on fitment and options for the E46 325i:

Common fitment variations

While the typical replacement is Group 49 (H7) 90Ah, production changes and optional equipment can shift the precise requirement. Always verify with the current battery label or a VIN-based parts lookup to ensure the correct size and specs.

• Voltage: 12V


• Capacity (Ah): around 90 Ah


• Cold-cranking amps (CCA): typically 680–730 A


• Group size: commonly Group 49 (H7) for many E46 models; other sizes such as Group 48/H6 can fit depending on production date and equipment


• Chemistry: maintenance-free lead-acid is standard; AGM variants are available but not required for most 2002 models

In practice, a 90 Ah, 680–730 CCA Group 49/H7 battery is a typical replacement for many 2002 325i cars, but always confirm the exact fit for your configuration.

How to verify the exact fit for your vehicle

To avoid buying an incompatible battery, verify the fit with one or more of these steps.

1. Check the current battery label for the group size (for example, 49/H7) and the listed CCA and Ah ratings.


2. Consult the owner's manual or BMW parts catalog (you can search by your car's VIN to pull the exact spec).


3. Measure the battery tray and terminal layout to ensure the replacement will physically fit and align with the positive/negative posts.


4. Ask a parts retailer or mechanic to cross-check your VIN with the correct battery specification; specify it is for a 2002 E46 325i.


5. Consider AGM only if your vehicle has start-stop, heavy electrical load, or you have a preference for longer life; otherwise a conventional flooded lead-acid battery is typically sufficient.

By following these steps, you’ll confirm the right battery size and type for your car, ensuring reliable starts and proper electrical performance.

Installation tips and where to buy

Where you buy can vary from auto parts chains to BMW dealerships; many retailers offer Group 49/H7 90Ah batteries that fit the E46. If you replace the battery yourself, remember to disconnect the negative terminal first, wear eye protection, and reset or re-enter radio codes as required. For most 2002 325i models, a standard flooded 12V battery will perform well, but AGM can be an option in certain configurations or climates.

Summary

For a 2002 BMW 325i, plan for a 12-volt, maintenance-free battery around 90 Ah with about 680–730 CCA, with Group 49/H7 being the most common fit for the E46 lineup. Always verify the exact group size, capacity, and terminal layout using the current battery label or VIN-based parts lookup to ensure a correct, safe install.

What kind of battery does a 2002 BMW 325i take?

DieHard Platinum AGM – Battery : H6 Group Size, 760 CCA, 950 CA, 120 Minute Reserve Capacity (Part No. H6-AGM)

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Diesel

What battery for BMW E46?

Battery For BMW 3 Series E46 M3 3.2 Exide AGM 12V 72Ah 760CCA Type AGM096.

What type of battery goes in a BMW?

AGM Vehicle Battery - Aux 14, 200 CCA, 12 AH.