OEM yes. Installed with seal install tool. Not sure of correct install position, just followed visual of original. I had this exact same problem with a 2010 Highlander rear diff. sold that one to buy this one. Problem did not show up until a 300 mile trip at speed sometimes above 75. It leaks worse after the seal changes. Great vehicle except this problem.
Thanks for the input. I have that exploded view. Lexus dealer trying to be helpful but they wanted over $800 to change this seal and my mechanic had it changed in about one hour for 100 bucks. I thought the dealer amount was way to high.
