https://www.reddit.com/r/BMWi3/comments/1bupgck/dashcam_speaker_upgrade_a_pillar_removal_question/

https://www.arsshop.de/bmw-i3-lautsprecherset-standard https://www.youtube.com/watch?v=Tl4Lruh6Xzs

https://www.youtube.com/watch?v=fQk-_OOnGAg

A Pillar removal https://www.youtube.com/watch?v=q3BLFmBLJtM&t=1820s

Dashcam install https://youtu.be/4RquV8xReI0?si=E8LrLlQ8qJFl7AjZ&t=22

DIY - BMW i3 - HiFihttps://www.youtube.com/watch?v=yfJq-paJSoE

https://www.mybmwi3.com/threads/sound-system-upgrade-information-standard-non-hk-models.3033/

[BMW i3 DIY Amplifier Installation[https://www.youtube.com/watch?v=B5mk5SfQ8Ys]]

https://www.audiokit.fi/kirjoitus/bmw-i3-harman-kardon-audio-upgrade

Here is an awesome guide that explains more about the HU and replacing the speakers in the kick panel:

http://www.mybmwi3.com/forum/viewtopi…

The speaker cables leading out of the HU (on the NON Harman Kardon) are as follows:

• Black/Brown THICKEST → Negative front left kick panel speaker
• Black/Brown MEDIUM → Negative front left door speaker
• Black/Red THICKEST → Positive front left kick panel speaker
• Black/Red MEDIUM → Positive front left door speaker
• Blue/Brown THICKEST → Negative front right kick panel speaker
• Blue/Brown MEDIUM → Negative front right door speaker
• Blue/Red THICKEST → Positive front right kick panel speaker
• Blue/Red MEDIUM → Positive front right door speaker

https://www.cen.uk/match-up-x4bmw-frt1-bmw-1-2-3-4-5-x-series-4-inch-coaxial-speakers-60w-rms

https://phoenixgold-eu.com/product-category/bmw-audio-integration/