Update on water in tires on RX 350. I have been back to dealership, they cleaned out water and balanced, few weeks later vibration was back so I took it upon myself to get another opinion. Went to my favorite local tire shop, had them dismount all four tires, sure enough water in every tire. Approximately 2 ounces in one, 4 ounces in another then the last two had a good 6-8 ounces in each one. So we cleaned everything up, rebalanced and filled with nitrogen this time. Went on a 10 day vacation driving through rain and such vibration has returned. Took back to the dealership today, they removed tires from rims and found water in them again. The service manager said he called Lexus and talked to the person that goes from store to store and apparently I am not alone in my struggle. According to the manager Lexus has been investigating this issues but it has only occurred on 2015 RX350 F Sport with Dunlop tires. He says Lexus has determined it is a tire problem and not a warranty issue. I disagree since they decided which tires to put on the car from the factory but no luck getting them to do anything about it. They have 38,000 miles with a good 10-15000 miles left on the tread. I posted this in case someone else has this really odd occurrence to let them know they are not crazy. It can and did happen.
I plan to contact Dunlop but really don't expect they will do anything for me. Wish me luck