Yeah I recently found that my rear driver side knuckle the threads that hold the bolts on that go through the hub assembly are stripped out inside of the knuckle itself. I need to know if there is a Highlander compatible knuckle for this if so does anybody know what it is. I can't afford to pay the 600 plus dollars that the Lexus dealer wants for this part

 

why not try a heli-coil?

 

Thread size is M12-1.25 I'd try thread tap or helicoil. Yes the 08-13 Highlander rear knuckles are compatible I have them on my car

 

This^^^^If that doesn't work, hit up a wrecking yard or E-bay which has WY's as well......