Vehicle-specific powered wiring harness plugs into the factory tail light connections without cutting or splicing. Provides a standard 4-way flat trailer connector for tail lights, brake lights, and turn signals.
The Curt 56557 provides a vehicle-specific trailer wiring solution for 2021-2024 BMW X4 models. OEM-compatible connectors T into the vehicle's tail light assemblies, eliminating the need to cut or splice into the factory wiring.
Its powered, circuit-protected PWM converter draws trailer lighting power from a dedicated battery connection while helping protect the BMW's factory electrical system. The included 4-way flat connector supplies the trailer's tail lights, brake lights, and turn signals.
OEM-compatible connectors integrate directly with the X4's factory tail light wiring
Dedicated battery power helps protect sensitive vehicle electrical circuits
Provides trailer tail light, brake light, and turn signal functions
Protected converter is designed for compatibility with modern vehicle lighting systems
Curt 56557 requires a direct battery connection to power the trailer lighting circuits. Fuse holder, battery wiring, and the necessary wiring components are included.
In The Package: • Curt 56557 Vehicle-Specific Wiring Harness • Powered Tail Light Converter • 4-Way Flat Trailer Connector • Protective Dust Cover • Fuse Holder & Battery Connection Wiring • Required Wiring Components
Curt's current application table lists 56557 for 2021-2024 BMW X4 models, all styles. Verify the vehicle model year before ordering.