The illumination device positioned centrally and high on the rear of the Toyota Tundra cab, specifically the replaceable component providing that illumination, serves as an auxiliary indicator of braking. It complements the primary brake lights and enhances visibility to trailing vehicles. A common example involves replacing the burnt-out light source within that high-mounted fixture on a Tundra.
The component’s proper function is critical for safety. A functioning high-mounted brake indicator improves the awareness of drivers behind the Tundra, potentially reducing the risk of rear-end collisions. Its presence became increasingly common on vehicles following research demonstrating its effectiveness in preventing accidents. Early versions often used incandescent technology, while newer iterations may employ LED alternatives for increased lifespan and energy efficiency.