Features 1. OEM Numbers: Replacement manufacturer part numbers for reference are a4518204210, a4519051800, 4519051800, ensuring a precise fit. 2. Fitment: Manufactured to meet standard specifications, this electric window switch button is a direct replacement for Smart 451 models. 3. Fast Response: Designed with advanced technology for quick activation, high sensitivity, and reliable control of the door window. 4. Easy Installation: Simple setup with no special tools or complex procedures required; replacement takes only a few minutes. 5. Durable Construction: Made from high-quality ABS and metal materials for enhanced durability and long-term performance. Specification Item Type: Power Window Switch Material: ABS + Metal OEM Numbers: a4518204210, a4519051800, 4519051800 Fitment: Replacement for Smart 451 Package List 1 x Power Window Switch Button