2013 BMW 128i Speaker Sizes
The 2013 BMW 128i factory audio system contains specific locations to accept components. Front door panel, rear deck lid, and rear side panel locations accommodate 4 inch speakers and 1 inch units, while below seats locations accept an 8 inch speaker size. Compatible speaker types for a 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 |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 4 | Midrange |
|
| Rear Deck Lid | 1 | Tweeter |
|
| Rear Deck Lid | 4 | Midrange |
|
| Rear Side Panel | 1 | Tweeter |
|
| Rear Side Panel | 4 | Midrange |
|
2013 BMW 128i Speaker Replacement Summary
7
total positions
4
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 4 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 3 Low: 22013 BMW 128i 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 2013 BMW 128i incorporates a three-way speaker configuration across multiple locations, with dedicated tweeters, midrange drivers, and a subwoofer position working together to cover different frequency ranges throughout the cabin.
- Tweeters measuring 1 inch are positioned in three separate locations including the front door panels, rear deck lid, and rear side panels, suggesting a distributed approach to high-frequency sound reproduction.
- Midrange speakers at 4 inches share the same mounting locations as the tweeters in the front doors, rear deck, and rear side panels, indicating component-style speaker placement rather than full-range coaxial designs in these positions.
- The below-seats location accommodates an 8-inch subwoofer, which may provide low-frequency reinforcement without consuming trunk space that would be required by traditional enclosures in the cargo area.
- Replacing the factory speakers in the 2013 BMW 128i would likely involve sourcing component sets with separate 1-inch tweeters and 4-inch midrange drivers, as the stock configuration separates these frequency ranges across distinct speaker elements.
- The radio opening accepts both single DIN and double DIN head units, potentially allowing for aftermarket receiver installations with expanded features or improved signal processing capabilities to drive upgraded speakers.
- Sound improvement efforts might focus on the 4-inch midrange positions first, as these drivers typically handle the critical vocal and instrumental frequencies that tend to be most noticeable during everyday listening.
- The relatively small 4-inch midrange size could limit low-frequency extension in the vocal range, which the 8-inch subwoofer position below the seats might help compensate for when properly integrated with appropriate crossover settings.