LEGO Light & Sound Siren 40931c01 2x6x1 Police Car Trans-Dark Blue Lights

Light & Sound Brick for Vehicle Builds

Add working lights and a siren sound to your builds with this 2x6 Light & Sound brick. Press the button to activate flashing trans-dark blue lights and a siren effect—an easy way to add interactive features without any wiring.

This self-contained electronic brick is ideal for vehicles and display models where you want a compact, plug-and-play light-and-sound function.

Build Ideas

• Emergency-style vehicles: Use it in cars, vans, and trucks to add a clear light-and-sound feature. If you’re building around police-themed minifigures, browse LEGO Police Minifigures.
• Utility and service vehicles: Great for support trucks, road vehicles, or any build that benefits from a visible signal light.
• Custom MOCs: A simple upgrade for MOCs that need an interactive element.

Pair It with More Parts

• Explore more components in our main LEGO® parts for sale collection.
• See more options in Light Bricks.

Product Details

• LEGO® Part Number: 40931c01
• Element description: Light & Sound Brick 2 x 6 with 2 Holes and Trans-Dark Blue Top and Siren Sound
• Size: 2 x 6 x 1 studs
• Function: Integrated lights and sound (battery included).

LEGO® parts are intended for ages 4 and up. They may pose a choking hazard for children under 3 years old.