Humming noise at highway speeds
I have a 2000 Toyota Camry XLE V6. I couple months ago I got in a minor accident where I veered off the right side of the highway, the car dropped down on a jaggedy edge, and the front right tire and wheel broke. I replaced the wheel and tire, however I now hear a humming noise when I drive. I only hear it at speeds above 55mph and if I drive at certain speeds (ex: 58mph and 69 mph) I hear almost no noise. It is a deep humming noise that is not very loud but definitely noticeable. It pulsates. It will go for about 4 seconds, then stop for a second, then go for another 4 seconds, etc.
I brought it to a mechanic and originally they said it probably needed a new wheel bearing. I brought it in for the replacement, but they said it didn't need a new wheel bearing. They said that a piece of metal bent and was probably touching the brakes at high speeds. They bent the part back and said the noise should go away. However, the noise is still there. Yesterday I brought in the car to the Toyota dealership to get the wheels aligned, since I figured they were probably knocked out of place from the accident and was hoping it would solve the problem. It took about 3 hours to align the wheels, since they said it was very misaligned, the camber needed adjustment, and it was very difficult. They also balanced the tires. It's great to have the wheels aligned, but the noise didn't go away.
Does anyone have any advice on what the noise could be caused from? Could it be a wheel bearing even though the mechanic said it wasn't? Could it be a carrier bearing? I do not have the know-how or tools to jack up the car and diagnose or fix it myself. I would really appreciate if anyone has advice. Thank you.