The process of replacing a car headlight bulb may vary depending on the make and model of your vehicle. In general, it involves accessing the back of the headlight assembly, disconnecting the electrical connector, and removing the old bulb by twisting it counterclockwise. Then, insert the new bulb, secure it by twisting it clockwise, reconnect the electrical connector, and ensure a proper seal. It’s recommended to consult your vehicle’s owner’s manual for specific instructions.