Genuine OEM Volkswagen Taillight Bulb Holder, part number 5K0945257. This essential component is responsible for securely holding the various bulbs within the taillight assembly and providing the necessary electrical connections. It is specifically designed for the rear left side of the vehicle. Constructed from durable black plastic, it withstands heat and vibrations. Using a genuine OEM bulb holder ensures correct bulb seating, reliable electrical contact, and proper light distribution, which is crucial for road safety and compliance.