Official - Pedestrian warning system retrofits now available !
🚨 BREAKING: Pedestrian warning system speaker retrofits available for certain Model 3s made after July 5 2019 through September 9 2020 as this period represents the timing of when the wiring harness was included but not the speaker (all Model 3s built since early September 2020 have the speaker...

Refer to Tesla SI-21-90-001 -- price is $200
Allows for Boombox functionality
Service center or Ranger for installation..
See link.