Genuine OEM Volkswagen Ignition Starter Switch with Sender Unit, part number 3C0905843AC. This critical electronic component is responsible for initiating engine start-up and transmitting essential signal data to the vehicle's control systems. It integrates both the physical switching mechanism and a sender unit for data communication. Weighing approximately 0.21 kg, this module is engineered for precise electrical compatibility. Using a genuine OEM switch ensures correct electronic communication, reliable starting, and seamless integration with the vehicle's complex electrical architecture.