Tesla has been making steady progress on adding the second of FSD’s “senses” — hearing. Since some FSD updates in late 2024, Tesla has been collecting audio input to help FSD recognize and respond to emergency vehicle sirens. Tesla’s VP of AI, Ashok Elluswamy, previously confirmed that improved handling of emergency vehicles would be coming to a future FSD update.
Now, it looks like Tesla is also introducing a feature to alert drivers when the vehicle detects an emergency vehicle. This change was found by @greentheonly in a production version of update 2025.8, which means that it may not be long before it’s enabled for everyone.
Emergency Siren Detection
In a future update, Tesla will enable the vehicle to alert the driver whenever it detects an emergency vehicle, either through sirens or visually. This is assuming the owner has given the vehicle permission to use the internal microphone. While the new Model Y features multiple internal microphones for better noise isolation, most Teslas only feature a single internal microphone, which is used for features such as voice commands and talking through Bluetooth.
Since the vehicle can see in all directions and is actively paying attention, it will likely detect an emergency vehicle even before the driver, so this is much more than a feature for FSD.
According to Green, Tesla included text in the vehicle software that describes the new emergency vehicle detection as:
“Automatically detects and alerts the driver to nearby sirens, helping you or Autopilot recognize and yield to approaching emergency vehicles. When a siren is detected, the media volume lowers, and an alert appears on the display. Sound detection data stays within the car and is not saved or transmitted unless data sharing is enabled.”
While on FSD, the in-vehicle microphone can help to detect and allow the vehicle to yield to approaching emergency vehicles. In addition, whether you’re using FSD or not, your media volume will be lowered, and an alert will be displayed on your vehicle’s display.
We’re not exactly sure what this alert will look like, but it could look similar to today’s “Keep your eyes on the road” alert, which displays over the center of the display with a blue hue over the screen to catch your attention.
This is an eye-catching alert, and in combination with the media volume being lowered, this should help to grab the attention of a driver in a safe and unobtrusive way.
We love these types of updates that not only improve FSD but also improve safety when drivers don’t have Autopilot enabled.
While Tesla hasn’t enabled this feature just yet, we should expect it soon since it lies dormant in update 2025.8. It could be enabled through a server-side configuration or in Tesla’s upcoming 2025 Spring Update.
