6171921 is a connector part number from TE Connectivity, formerly Tyco Electronics. The part is an integrated electrical connector, primarily used in the Automotive industry, which is designed to collect and transmit power, data, and/or signals between two or more devices. It is typically used in brake, lighting, and wheel speed applications. The connector is weatherproof and dustproof, making it ideal for use in harsh environments. The connector has two sides, both containing terminals that are automatically locked and unlocked with a simple locking mechanism. It is made of a high-grade polycarbonate material, making it strong and durable.