2011 BMW 335i Speaker Sizes

The 2011 BMW 335i speaker size chart provides factory speaker specifications and locations throughout the audio system. Information includes speakers in the front door panel, rear door panel, rear side panel, center dash, rear deck lid, and below seats. Details support replacement or aftermarket upgrade planning by identifying factory speaker configurations at each location.

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Speaker Details by Location
Location	Size	Type	Notes
Below Seats	8	Subwoofer	Very limited height clearance Medium replacement priority Replacement difficulty: medium
Center Dash	1	Tweeter	Requires dashboard disassembly Medium replacement priority Replacement difficulty: medium
Center Dash	4	Midrange	Requires dashboard disassembly Medium replacement priority Replacement difficulty: medium
Front Door Panel	1	Tweeter	Standard installation High replacement priority Replacement difficulty: low
Front Door Panel	4	Midrange	Standard installation High replacement priority Replacement difficulty: low
Rear Deck Lid	1	Tweeter	Access through trunk Medium replacement priority Replacement difficulty: low
Rear Deck Lid	4	Midrange	Access through trunk Medium replacement priority Replacement difficulty: low
Rear Door Panel	1	Tweeter	Standard installation Medium replacement priority Replacement difficulty: low
Rear Door Panel	4	Midrange	Standard installation Medium replacement priority Replacement difficulty: low
Rear Side Panel	1	Tweeter	Requires trim removal Medium replacement priority Replacement difficulty: medium
Rear Side Panel	0.75	Tweeter	Requires trim removal Medium replacement priority Replacement difficulty: medium
Rear Side Panel	4	Midrange	Requires trim removal Medium replacement priority Replacement difficulty: medium

2011 BMW 335i Speaker Replacement Summary

12 total positions

6 easy to replace

2 high priority

0 professional only

Replacement difficulty:

Low: 6 Medium: 6 High: 0

Replacement priority:

High: 2 Medium: 7 Low: 3

2011 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 2011 BMW 335i audio system utilizes a tweeter and midrange speaker configuration across multiple locations, with tweeters ranging from 0.75 inch to 1 inch and midrange speakers consistently sized at 4 inches throughout the cabin.
Tweeter locations in this system include the rear side panel (0.75 inch), center dash, front door panel, rear deck lid, rear door panel, and an additional rear side panel position (all 1 inch), suggesting a multi-point high-frequency distribution design.
Midrange speakers occupy the center dash, front door panel, rear deck lid, rear door panel, and rear side panel locations, all accommodating 4-inch units that likely handle the bulk of vocal and instrumental reproduction.
An 8-inch subwoofer positioned below the seats provides low-frequency output, which may be the primary consideration for those seeking enhanced bass response in the 2011 BMW 335i.
The radio opening accepts both single DIN and double DIN head units, potentially allowing for aftermarket receiver installation alongside speaker upgrades.
Replacing the factory speakers with aftermarket alternatives could improve clarity and dynamic range, particularly if the tweeter and midrange components are upgraded as matched sets within their respective size constraints.
The system's reliance on separate tweeter and midrange drivers rather than full-range coaxial speakers indicates a component-style setup that may benefit from coordinated crossover frequency management during replacement.
The under-seat subwoofer location limits the maximum cone size to 8 inches, which may influence expectations regarding low-frequency extension and output capability compared to larger enclosure-based alternatives.