Duplo Siren with Light & Sound, 1 x 2 White Base with Red Button

Replacing the LED

LEGO does not sell the LED separately. If it still does not light up with new batteries, in practice you replace the whole light brick.

Where to order a light brick

Missing from a new set, or broken? Request it from LEGO: LEGO Replacement Parts

For older sets LEGO often no longer offers the light brick there. You can buy it separately here:

• LEGO does not currently sell this light brick separately on Pick a Brick.
• Separately, new or used, on BrickLink (the LEGO Group's parts marketplace): BrickLink 39787c01
• LEGO element number, useful for customer service: 6555879, 6484650, 6457608