My wife has a 2003 ES300 with 15k miles, hardly driven at all since new... I followed the routine maintenance by the dealer... oil change, tire rotation etc...
The Toyo tires that came with the car has lots of treads left. Since last year, around 11-12k, I started to notice some whining noise as the car is warmed up and is doing 40+ mph. Took it to the dealer to check a couple of times. The verdict is : the tires have been worn unevenly. I have not done any alignment on this car before. The dealer suggests to replace the tires and to do alignment. The dealers have confirmed that the car is mechanically sound... suspension, steering...
An experienced mechanic thinks that the car has been sitting in the garage for too long and the tires have developed "square" spots on the wheels... hence the noise. Otherwise the noise is harmless.
I think the noise problem could be something mechanical... drive axle, wheel bearing etc...
I want to get rid of the noise... should I replace these Toyo tires? I have a lot of luck using Michelins and is thinking of the Hydroedge for the claimed comfort, quietness, dry/wet traction and long mileage warranty. but it does not come with the 94V speed rating (onloy 94T). Frankly my wife and I are unlikely to be driving the ES300 like a race car, even on freeway. The most we would do is about 80mph.
I have done some research on the Tirerack.com... a lot of their customers like this Hydroedge but of the 2 Lexus users' comments... they both complain excessive road noise.
Can anyone offer some suggestions? will replacing the tires fix this problem?