2009 BMW 335d Speaker Sizes
The 2009 BMW 335d factory audio system features specific locations for sound reproduction components. Center dash, front door panel, rear deck lid, and rear door panel accommodate 4 inch speakers, while below seats supports an 8 inch speaker size. Front door panel and rear deck lid accept 1 inch units. Compatible speaker types for replacement and upgrade include tweeter, midrange, and subwoofer.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Below Seats | 8 | Subwoofer |
|
| 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 | 4 | Midrange |
|
2009 BMW 335d Speaker Replacement Summary
7
total positions
5
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 5 Medium: 2 High: 0Replacement priority:
High: 2 Medium: 5 Low: 02009 BMW 335d 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 2009 BMW 335d features a distributed speaker system with tweeters, midrange drivers, and subwoofers positioned throughout the cabin, suggesting a factory audio setup designed for balanced frequency response across multiple listening positions.
- Front door panels accommodate both 1-inch tweeters and 4-inch midrange speakers, indicating a component-style configuration that separates high and mid-frequency reproduction for potentially improved staging and clarity.
- The rear deck lid mirrors the front door configuration with both 1-inch tweeters and 4-inch midrange units, which may help maintain consistent tonal balance for rear seat passengers.
- A 4-inch midrange speaker in the center dash location could serve as an anchor for center imaging, potentially important for vocal clarity and soundstage coherence in the front seating area.
- Rear door panels contain 4-inch midrange speakers without dedicated tweeters, which might place these locations lower in upgrade priority compared to the front doors when considering component speaker replacements.
- The 8-inch subwoofer positioned below the seats represents the system's bass foundation, and this location might limit low-frequency output compared to trunk-mounted alternatives due to space constraints.
- Replacing the front door tweeters and midrange drivers could yield the most noticeable improvement in sound quality for the driver and front passenger, as these positions typically contribute most significantly to the primary listening experience.
- The radio accepts both single DIN and double DIN head units, providing flexibility for aftermarket receiver upgrades that might include enhanced processing capabilities or modern connectivity features.
- Component speaker sets designed for the front stage would need to include separate tweeters and midrange drivers to properly utilize the existing mounting locations in the door panels.
- The under-seat subwoofer location may require shallow-mount replacement options if upgrading, as vertical clearance in this position is typically limited compared to traditional enclosure installations.