2017 BMW 430i Speaker Sizes

The 2017 BMW 430i factory audio system features a center dash, front door panel, rear, and rear side panel accommodating 1 inch speakers and 4 inch units, while areas below seats accept an 8 inch speaker size. Compatible speaker types for a replacement and upgrade consist of tweeters, midrange units, and subwoofers.

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 430i 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 430i audio system incorporates a multi-driver configuration with dedicated tweeters, midrange speakers, and a subwoofer across nine distinct mounting locations.
Tweeters at 1 inch are distributed across four positions: center dash, front door panels, rear, and rear side panels, suggesting a focus on high-frequency dispersion throughout the cabin.
Midrange drivers at 4 inches occupy the same four locations as the tweeters, indicating a component speaker arrangement rather than full-range coaxial units in these positions.
The subwoofer positioned below the seats measures 8 inches and handles low-frequency reproduction separately from the midrange and tweeter components.
Upgrading the midrange speakers might offer more noticeable improvements to vocal clarity and instrumental detail than replacing the tweeters alone, given their broader frequency range coverage.
The separate tweeter and midrange configuration allows for more precise frequency division and potentially cleaner sound staging compared to coaxial designs.
Replacement speakers would need to match the specific size constraints at each location, with particular attention to mounting depth and connector compatibility not specified in these basic dimensions.
The under-seat subwoofer location may limit replacement options to shallow-mount or vehicle-specific designs due to typical space constraints in this mounting position.