2015 BMW 328i Speaker Sizes
The 2015 BMW 328i speaker size chart details factory audio system specifications across multiple locations. Information covers replacement speakers for the center dash, front door panel, rear deck lid, rear door panel, and below seats. Aftermarket upgrade specifications are provided for each position to assist with audio system modifications.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Below Seats | 8 | Subwoofer |
|
| Center Dash | 1 | Tweeter |
|
| Center Dash | 4 | Midrange |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 4 | Midrange |
|
| Rear Deck Lid | 1 | Tweeter |
|
| Rear Deck Lid | 4 | Midrange |
|
| Rear Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 4 | Midrange |
|
2015 BMW 328i Speaker Replacement Summary
9
total positions
6
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 6 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 7 Low: 02015 BMW 328i Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN or Double DIN | 7"×2" or 7"×4" | 180×50 or 180×100 | Vehicle supports both radio sizes |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 2015 BMW 328i employs a multi-way speaker configuration with dedicated tweeters, midrange drivers, and a subwoofer positioned across different locations throughout the cabin.
- All tweeter locations accept 1-inch units, suggesting a uniform high-frequency reproduction strategy across the center dash, front door panels, rear deck lid, and rear door panels.
- Midrange drivers are standardized at 4 inches across the same four locations that house tweeters, indicating a component-style separation of frequency ranges rather than coaxial full-range speakers.
- The subwoofer location below the seats accommodates an 8-inch driver, which may provide bass reinforcement without requiring trunk space allocation.
- Replacing the factory midrange drivers could potentially yield noticeable improvements in vocal clarity and instrumental detail, as these handle the critical middle frequencies where most musical content resides.
- The separated tweeter and midrange configuration allows for independent upgrades of high and mid-frequency components, offering flexibility in sound customization compared to integrated coaxial designs.
- Aftermarket component speaker sets with 1-inch tweeters and 4-inch midrange drivers would likely integrate directly into the existing mounting locations without extensive modification.
- The radio opening supports both single DIN and double DIN head units, providing options for aftermarket stereo installation if source unit upgrades are considered alongside speaker replacements.