Aaf8

Need some help. I have a 2015 RX350 with 25k. New tires, two road force balance by two different dealers and I'm still getting a high frequency vibration mostly in the seats above 60mph. Dealer cannot find any issues. Any suggestion would be helpful.

JDR76

Did you have the issue before you got the new tires?

Aaf8

Yes...unfortunately. I assumed new tires would help. No luck.

litzdog911

Front tires? Rear tires? What happens if you rotate the wheels front-to-back?

Aaf8

I replaced all four tires.

Clutchless

Possibly a bad wheel bearing or CV joint or rotor runout isses. Or If All Wheel Drive, maybe drive shaft balance issues. I would contact Lexus directly (numbers are in owners manual) and tell them you want a Zone Technical Representative to inspect it at the dealer. They are specialists who visit dealers to deal with problems such as yours that the dealer cannot resolve.

pasica

Try removing one of the exhaust rubber mounts underneath the driver/passenger. I removed one the vibration is gone.