2017 BMW 440i Speaker Sizes

Center dash, front door panel, rear, and rear side panel accept 4 inch speakers within the 2017 BMW 440i factory audio system. Center dash, front door panel, rear, and rear side panel also support an 8 inch speaker size. Below seats accommodate subwoofers as a replacement and upgrade option, while tweeters and midranges round out compatible speaker types.

Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.

Speaker Details by Location
Location	Size	Type	Notes
Below Seats	8	Subwoofer	Very limited height clearance Medium replacement priority Replacement difficulty: medium
Center Dash	4	Midrange	Requires dashboard disassembly Medium replacement priority Replacement difficulty: medium
Center Dash	1	Tweeter	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	1	Tweeter	Secondary sound location Medium replacement priority Replacement difficulty: medium
Rear	4	Midrange	Secondary sound location Medium replacement priority Replacement difficulty: medium
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 440i Speaker Replacement Summary

9 total positions

2 easy to replace

2 high priority

0 professional only

Replacement difficulty:

Low: 2 Medium: 7 High: 0

Replacement priority:

High: 2 Medium: 5 Low: 2

Additional Notes

The 2017 BMW 440i features a multi-component speaker system with separate tweeters, midrange drivers, and subwoofers distributed across nine distinct locations throughout the cabin.
Tweeters measuring 1 inch are installed in four locations: the center dash, front door panels, rear area, and rear side panels, suggesting a focus on high-frequency sound dispersion.
Midrange drivers at 4 inches occupy the same four locations as the tweeters, indicating a likely component speaker setup where tweeters and midrange units work together rather than as full-range coaxial speakers.
The subwoofer position below the seats suggests a space-efficient bass solution that may provide low-frequency output without consuming trunk space.
Replacing the tweeters could be prioritized for those seeking improved clarity in vocal and instrumental detail, while midrange replacements might address overall tonal balance and presence.
The 8-inch subwoofer represents the only dedicated low-frequency driver in the system, potentially making it a focal point for bass enhancement upgrades.
Component speaker replacements would require attention to both the 1-inch tweeter and 4-inch midrange positions at each location to maintain proper frequency distribution.
The symmetrical speaker distribution between front and rear locations suggests an attempt at balanced soundstage throughout the cabin for all occupants.
Aftermarket upgrades might involve replacing component sets at the door and dash locations while potentially upgrading or supplementing the under-seat subwoofer for enhanced low-frequency response.