Third Brake Light (High-level Brake Light)

It can be seen over and through the car in front. It is required on new cars in many countries. Most modern versions use LEDs. Cars with a spoiler often have it built into the spoiler.

It is wired to the brake light switch and lights together with the main brake lights.

A failed third brake light can lead to a failed roadworthiness test. Leaking seals on tailgate-mounted lights can let water into the boot.