2017 BMW i8 Speaker Sizes

The 2017 BMW i8 factory audio system designates specific locations for acoustic components. B-pillar, center dash, and front door panel locations accommodate 1 inch units, while rear locations accept 6x9 inch units. B-pillar, center dash, and front door panel locations also support a 4 inch speaker size. Compatible speaker types for replacement or upgrade procedures consist of tweeters, midrange units, and full-range units.

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

Speaker Details by Location
Location	Size	Type	Notes
B-Pillar	1	Tweeter	Complex disassembly required Professional service only Low replacement priority Replacement difficulty: high
B-Pillar	4	Midrange	Complex disassembly required Professional service only Low replacement priority Replacement difficulty: high
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	6x9	Full-Range	Secondary sound location Medium replacement priority Replacement difficulty: medium

2017 BMW i8 Speaker Replacement Summary

7 total positions

2 easy to replace

2 high priority

2 professional only

Replacement difficulty:

Low: 2 Medium: 3 High: 2

Replacement priority:

High: 2 Medium: 3 Low: 2

Additional Notes

The 2017 BMW i8 features a multi-component speaker configuration with separate tweeters and midrange drivers in multiple locations, suggesting a factory audio system designed for staged sound reproduction rather than single full-range speakers in forward positions.
Three separate 1-inch tweeter locations (B-pillar, center dash, and front door panel) indicate a factory system that distributes high-frequency content across the soundstage, which aftermarket installers might consolidate or upgrade depending on the replacement component speaker design.
The presence of dedicated 4-inch midrange drivers in the same three locations as the tweeters points to a three-way component setup in the front cabin, where replacements would likely need to address both tweeter and midrange frequencies to maintain factory sound character.
The 6x9-inch full-range speakers in the rear position handle the entire frequency spectrum in that location, contrasting with the separated frequency approach in the front, which could create tonal balance considerations when selecting replacement speakers.
Upgrading the front tweeters and midrange drivers to component sets with similar size specifications might preserve factory mounting points while potentially offering improved frequency response and power handling compared to the original equipment.
The smaller driver sizes (1-inch and 4-inch) in the front positions may limit low-frequency output from those locations, placing greater responsibility on the rear 6x9-inch speakers or potential subwoofer additions for bass reproduction.
Component speaker replacements for the front positions would need to account for separate tweeter and midrange installation requirements across three distinct mounting locations per side, potentially complicating installation compared to vehicles with simpler coaxial configurations.