The 2005 BMW 325i typically uses a 12-volt lead-acid battery with about 90 Ah capacity, commonly in Group Size 48 (also known as H6) and roughly 680–750 cold-cranking amps. Exact size can vary by market and equipment.
In more detail, the E46-generation 325i commonly relies on a battery designed to support the car’s standard electronics, plus optional features that may draw more power when the engine is off. Replacement parts are often labeled to match Group 48/H6 while delivering around 90 Ah and 680–750 CCA, but regional specifications and trim levels can influence the precise spec.
Typical battery specifications for the 2005 BMW 325i
Understanding the main specs helps when replacing the battery or choosing a replacement. The following are the most common values for this model, noting that variations exist by market and options.
- Group size: 48 (H6)
- Capacity: about 90 Ah (DIN rating)
- Cold-cranking amps (CCA): typically 680–750 A
- Voltage: 12 volts
- Common dimensions: approximately 242 mm x 175 mm x 190 mm
Battery sizes can vary with options such as sport packages, premium sound systems, or equipment that draws more power. Always verify the exact replacement part number using your VIN or by inspecting the battery label.
Notes on market differences and replacement tips
In North America, Group 48 / H6 is the typical fit for many E46 325i models, while European-market cars sometimes use a closely related H6/Group 48 size or an equivalent 90 Ah battery. When replacing, ensure the terminal layout and mounting fit your car and that the battery fits under the hood with proper clearance.
Summary
For most 2005 BMW 325i models, the battery is a 12-volt lead-acid unit around 90 Ah, commonly Group Size 48 (H6) with roughly 680–750 CCA. Always confirm with your VIN and the battery label, as variations exist by market and equipment.