Tesla Model S / Tesla Model 3 / Tesla Model X / Tesla Model Y 2012–2025 trailer brake ECU adapter wiring harness – 1072586-00-A

Adapter/pigtail wiring harness for connecting an external trailer brake controller to Tesla's trailer brake system.

• OEM/part number: 1072586-00-A
• Original designation: ASY, HARN, TRAILER BRAKE ECU ADAPTER
• Type: mating pigtail / adapter wiring harness
• Function: connects an external trailer brake controller to the vehicle's Trailer Brakes ECU connector
• Verified application: Tesla Model X with the relevant towing/trailer configuration
• Model Y: the part is also used with Tesla's trailer brake controller connection on relevant Model Y configurations

Check that the vehicle has the correct 4-pin trailer brake connector and that the part number/connector matches before ordering. Tesla has used different towing configurations depending on the model, market and production date.