Do these connect to the factory wiring harness, or do I need to run new lines?

These mount at factory rocker points and use the existing harness — no additional wiring required for standard installation. Verify your MKZ model year matches before ordering to ensure connector compatibility.

Will the memory function work with my existing seat presets, or do I need to reprogram?

Memory integration syncs with your vehicle's factory seat memory module. Once installed, mirror position will recall automatically when a stored seat preset is selected — no separate programming needed.

Are these new, refurbished, or take-off units?

These ship as new units with full assembly. Each mirror undergoes in-house quality inspection before shipment to ensure heating element function and motor response before it reaches you.