I am now at 249k miles on my fantastic RX400h. One of the issues that shows at that mileage are the cooling fans on the radiator failing mechanically. The motor shafts were actually wobbling.
Those motors are quite expensive at $200 apiece, total of over $400 for motors. On the other Lexus site a gentleman came up with TYC radiator cooling fan assembly that had motors that could be take off a Toyota Highlander Hybrid 2008 that fit our different shroud assembly. I did this last night and it was a direct fit, including the plugs and harness. Just remove assembly and take fan blades off and remove motors. Here is the final good news, the whole Highlander assembly cost $139 at your favorite site ie Amazon or Rockauto. The shroud from the highlander will not work in our cars as it does not have the expansion tank. You use only the motors and our old fan blades. Top of the morning to everyone.