2008 BMW 335i Speaker Sizes
The 2008 BMW 335i factory audio system features specific locations for various drivers, where the center dash, front door panel, rear deck lid, and rear door panel accommodate 4 inch speakers. Below seats accommodate an 8 inch speaker size, while the front door panel and rear deck lid also support 1 inch units. Compatible speaker types for audio replacement and upgrade include tweeter, midrange, and subwoofer units.
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 |
|
2008 BMW 335i 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: 02008 BMW 335i 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 2008 BMW 335i features a multi-speaker configuration with dedicated tweeters, midrange drivers, and a subwoofer location, suggesting a component-style factory audio system rather than full-range coaxial speakers.
- Tweeters in the front door panels and rear deck lid measure 1 inch, which could be replaced with aftermarket units of the same size to potentially enhance high-frequency clarity without requiring modifications to the mounting locations.
- Midrange speakers at 4 inches are distributed across the center dash, front door panels, rear deck lid, and rear door panels, indicating that these drivers may handle the majority of the vocal and instrumental frequency range in the stock system.
- The presence of an 8-inch subwoofer location below the seats suggests factory bass reinforcement, though upgrading this position might offer improved low-frequency output and extension depending on the aftermarket subwoofer's power handling and enclosure compatibility.
- Replacing the 4-inch midrange speakers could be prioritized for those seeking improved vocal reproduction and overall tonal balance, as these drivers cover critical frequencies in most music and speech content.
- The 2008 BMW 335i accepts both single DIN and double DIN head units, which may provide flexibility for upgrading the radio to a model with enhanced amplification or signal processing capabilities to support aftermarket speakers.
- Component speaker systems with separate tweeters and midrange drivers would align with the factory configuration, potentially simplifying installation while taking advantage of the existing mounting points and crossover design.
- The tweeter locations in both front and rear positions indicate that the factory system attempts to create an extended soundstage, which aftermarket tweeters with wider dispersion patterns might further enhance.