2015 BMW 328d Speaker Sizes
A 2015 BMW 328d speaker size chart provides factory specifications for audio system components across multiple locations. Information includes dimensions for speakers in the center dash, front door panel, rear deck lid, rear door panel, and below seats. Data assists with aftermarket replacement or upgrade planning by listing specifications for each factory speaker position within the audio system.
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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 328d 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 328d Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN | 7"×2" | 180×50 | Standard size for basic car radios with small display or no display |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 2015 BMW 328d uses a two-way component speaker system with separate tweeters and midrange drivers across multiple locations throughout the cabin, suggesting a factory audio configuration designed for broader frequency distribution.
- Tweeters measuring 1 inch are positioned in the center dash, front door panels, rear deck lid, and rear door panels, which may indicate that high-frequency reproduction is distributed across four distinct zones within the vehicle.
- Midrange speakers of 4 inches are installed in the same locations as the tweeters, working in conjunction to handle mid-frequency sound reproduction without full-range drivers.
- An 8 inch subwoofer located below the seats handles low-frequency bass output, a placement that could provide space-saving benefits while maintaining bass response in the 2015 BMW 328d.
- The factory radio uses a single DIN form factor, which represents a standard head unit size that may offer compatibility with various aftermarket replacement options if desired.
- Replacing the 1 inch tweeters could potentially refine high-frequency clarity, though the small size may limit available aftermarket options compared to more common tweeter sizes.
- The 4 inch midrange speakers might be prioritized for replacement by those seeking improved vocal and instrumental reproduction, as midrange frequencies often carry much of the audible detail in music and speech.
- Upgrading the under-seat subwoofer could enhance bass depth and impact, though the 8 inch size and mounting location may present installation challenges depending on the aftermarket unit selected.
- The distributed speaker layout with dedicated tweeters and midrange drivers in multiple locations suggests that component speaker upgrades might yield more noticeable improvements than coaxial full-range replacements.
- Matching impedance and power handling specifications would be necessary when selecting replacement speakers to maintain compatibility with the factory amplifier, if one is present in the audio system.