Is the power window in your 4Runner's tailgate not moving smoothly or stuck? This regulator assembly is the direct replacement part you need. It's specifically designed for the power-operated liftgate window on 2010 through 2023 Toyota 4Runner models. Important note: This is the regulator mechanism only; it does NOT include the motor. You'll reuse your existing motor from the old unit. It's a common repair for worn-out cables or gears inside the regulator. Installation requires some mechanical skill and taking apart the interior tailgate panel. Before you buy, please double-check your vehicle's year and confirm the issue is with the regulator, not the motor or switch. A new regulator will get your rear window rolling up and down quietly and reliably again, which is super handy for loading gear or letting fresh air in.