One problem related to front suspension wheel bearing has been reported for the 2007 Lexus LX470. The most recently reported issues are listed below.
Purchased vehicle from dealership. Drove home on the expressway. At 40-60 mph after five minutes the entire under carriage starting vibrating and making a whistling sound. When I turn the vehicle left or right the car looses balance. I brought it back three times to the dealership and it is not fixed. They changed the wheel bearings both sides in the front, and a wheel alignment which did not solve the problem. I purchased this at m&I motors in highland park illinois.