The E92 335i typically uses a 12-volt battery around 90 Ah, commonly listed as Group 49 (H7) and often an AGM type, especially on cars with Start-Stop. However, exact specifications depend on model year, market, and options, so it’s essential to verify your car’s label or VIN-specific requirement.
BMW’s E92 3 Series coupe (produced roughly 2007–2013) carries substantial electrical demands from its engine management, infotainment, and optional Start-Stop systems. This article explains how to identify the correct size for your vehicle and what to consider when replacing it, including typical Group sizes, AGM needs, and replacement best practices.
Typical battery size and type for the E92 335i
Before listing common sizes, note that Start-Stop-equipped models almost always require an AGM battery, and the trunk installation can influence fitment and terminal orientation. Use this as a baseline, then verify with your car’s labels and documentation.
- Group size: commonly Group 49 (also referred to as H7 in some catalogs), corresponding to about 90 Ah.
- Battery type: AGM (absorbent glass mat) preferred or required for many E92 335i configurations, especially those with Start-Stop or advanced electrics.
- Cold-cranking amps (CCA): typically in the 700–900 A range, varying by market and supplier.
Because specifications can vary by year and market, always check the battery label on your car or the official BMW parts diagram for your VIN to confirm the exact size, type, and CCA needed.
How to determine the exact size for your E92 335i
Use these steps to verify the correct replacement and avoid fitment or performance issues:
- Inspect the current battery label for Group Size, CCA, and Ah rating, and transcribe any part numbers visible on the battery.
- Check your vehicle’s VIN against BMW’s official parts catalog or owner’s manual to confirm the recommended battery specification for your exact build.
- Determine if your car has Start-Stop or other electronics that typically require an AGM battery.
- Choose a replacement that matches the group size, AGM requirement, and CCA rating; prefer OEM or reputable aftermarket options designed for BMWs.
Following these steps helps ensure the replacement battery will fit properly and preserve electronics and performance.
Installation tips and care for the E92 335i battery
Modern BMWs can lose settings or require reinitialization after battery replacement. Disconnecting the negative terminal first and following the vehicle’s recommended procedure helps minimize issues. If your car uses Start-Stop, an AGM battery is especially important to maintain reliability and longevity.
Summary: For the E92 335i, the typical replacement battery is a 12V AGM unit around 90 Ah, usually Group 49/H7, with a CCA rating in the ballpark of 700–900 A. Verify exact specs via the battery label and VIN-based parts information, and ensure the replacement matches the vehicle’s Start-Stop electronics and fitment in the trunk battery compartment.
Summary: The key steps are to check the existing battery’s group size and CCA, confirm AGM if Start-Stop is present, verify fitment in the trunk, and choose a high-quality OEM or reputable aftermarket battery matched to your E92 335i’s specifications.