Genuine BOSCH Dimmer Relay
Part number 0332515012

A dimmer relay in a car is an electronic device that controls the brightness of the vehicle's lights. It is typically used to adjust the intensity of the headlights and interior lights. This relay works by regulating the current flowing to the lights, allowing the driver to adjust the brightness according to their preferences or the driving conditions.

By reducing or increasing the voltage supplied to the lights, the dimmer relay allows the driver to have better visibility at night or in low-light situations, as well as avoiding blinding other drivers on the road.