This is always a Grey Area Scott.. When not going to the Dealership.. I Have heard on occasions that Tyres being fitted at Private Garages have problems because the fitter Shall we say Does not handle the small units with the Experienced care of the Lexus Dealerships. I,m not saying this is what has happened but.. it Could be.. And These little units are expensive.. Certainly hope that is not the case and resolved Soon... Best Regards..!!