I haven't done it on the LC but I recently replaced two actuators on my wife's GX470. Get some trim removal tools and you will need a torx bit. I watched a video on YouTube but they are mostly the same. The GX procedure was similar to my Lexus GS430 in the past. You can by the Aisin actuators on Amazon for a little over $100 or buy the small motors for $10 but you have to crack open the old actuators. It shouldn't take you more than an hour to replace. I can do it in under 30 minutes now after doing one.
$122 Aisin DLT-008 Door Lock ActuatorThank you.
Do you have the actuator part number?