2017 BMW M240i Speaker Sizes

This speaker size chart details the factory audio system specifications for the 2017 BMW M240i. Information includes replacement speaker locations throughout the vehicle: center dash, front door panel, rear deck lid, rear side panel, and below seats. Aftermarket upgrade specifications are provided for each position within the audio system.

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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 Side Panel	1	Tweeter	Requires trim removal Medium replacement priority Replacement difficulty: medium
Rear Side Panel	4	Midrange	Requires trim removal Medium replacement priority Replacement difficulty: medium

2017 BMW M240i Speaker Replacement Summary

9 total positions

4 easy to replace

2 high priority

0 professional only

Replacement difficulty:

Low: 4 Medium: 5 High: 0

Replacement priority:

High: 2 Medium: 5 Low: 2

Additional Notes

The 2017 BMW M240i audio system incorporates a multi-speaker configuration with dedicated tweeters, midrange drivers, and subwoofer locations throughout the cabin, suggesting a factory installation designed for frequency-specific sound reproduction.
Tweeters measuring 1 inch are positioned at four distinct locations: center dash, front door panels, rear deck lid, and rear side panels, which may indicate an attempt to create broader high-frequency dispersion across the listening environment.
Midrange drivers at 4 inches occupy the same four locations as the tweeters, potentially forming component-style speaker pairs that separate frequency ranges between dedicated drivers rather than using coaxial designs.
The below-seats location houses an 8-inch subwoofer, a placement that could provide low-frequency output while preserving cargo space and maintaining a relatively concealed installation.
Replacing the midrange drivers might yield noticeable improvements in vocal clarity and instrumental detail, as these 4-inch speakers handle the frequency range where most musical content and speech intelligibility resides.
Aftermarket tweeters could potentially enhance high-frequency extension and detail retrieval, though the 1-inch size represents a common specification that may limit differentiation between stock and replacement options.
The subwoofer location beneath the seats may present challenges for certain aftermarket replacements, as enclosure volume and mounting depth could restrict compatibility with drivers requiring larger installations.
A component speaker upgrade focusing on the front door panel locations would address both tweeter and midrange positions simultaneously, potentially offering more cohesive sonic integration than replacing individual drivers separately.