2011 BMW 328i Speaker Sizes
The 2011 BMW 328i speaker size chart provides factory speaker specifications and locations for replacement or aftermarket audio system upgrades. Information includes speaker positions in the rear side panel, center dash, front door panel, rear deck lid, rear door panel, and below seats, detailing factory speaker specifications for each location 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 |
|
| Rear Side Panel | 1 | Tweeter |
|
| Rear Side Panel | 0.75 | Tweeter |
|
| Rear Side Panel | 4 | Midrange |
|
2011 BMW 328i Speaker Replacement Summary
12
total positions
6
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 6 Medium: 6 High: 0Replacement priority:
High: 2 Medium: 7 Low: 32011 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 2011 BMW 328i incorporates a multi-speaker configuration with dedicated tweeters and midrange drivers across multiple locations, suggesting a factory audio design that separates frequency ranges for potentially improved sound staging.
- Tweeter sizes vary between 0.75 inch and 1 inch depending on location, with the rear side panel containing both size variants, which may indicate dual tweeter placement in that position.
- Standardized 4 inch midrange speakers populate five separate locations throughout the cabin, including the center dash, both door panels, rear deck lid, and rear side panel areas.
- The below-seats location accommodates an 8 inch subwoofer, which tends to provide low-frequency reinforcement without consuming trunk or cabin space that would be needed for larger enclosures.
- Component speaker upgrades might focus first on the front door panel positions, as these typically contribute most directly to the driver and front passenger listening experience in factory audio configurations.
- The presence of separate tweeter and midrange drivers in the same locations suggests that aftermarket component speaker sets with passive crossovers could potentially integrate into the existing mounting points.
- Radio replacement options include both single DIN and double DIN head units, offering flexibility for aftermarket stereo installations with varying feature sets and display sizes.
- The rear deck lid contains both tweeter and midrange speakers, which may require careful consideration during replacement to maintain the factory sound balance between front and rear soundstage.
- Subwoofer replacement under the seats would likely be constrained by vertical clearance and mounting configuration, potentially limiting options to shallow-mount or low-profile designs.