This is a Headlight Switch designed for a 1987-1990 Pontiac Bonneville by Standard Motor Products. The switch is a direct replacement for the original part, with the manufacturer part number 915BD54. It is compatible with models featuring auto headlights and fits Pontiac Bonnevilles from the years 1987 to 1990. This single pack switch is essential for controlling the headlights in the specified vehicle model and years.