I have a 97 rav4 and just changed all wheel bearing, front and back. However, i hear this humming sound everytime I drive and the mechanic is telling me that I need to change the rear wheel bearing. But I just changed them!!! Anyone had similar "humming" sounds after changing the wheel bearing and figured out what type of problem this might be?

SOURCE: Changing of front wheel bearing

i assume u want to both inner and outer bearings...you have to pull the whell off the caliper for the brakes has to come off,there will be a center cap on the hub,,take ot off,inside there you will find a nuts with a cotter pin in it.remove it.gently pull on the hub abd iit should come off in your hands.the outer bearings will come out always remember to repack them with grease before you replace them the inner bearings will be behind the rotor and will have to be chanfed also as well as greased,you have to do this on both sides the same process.put it back together the same way you take it apart

SOURCE: My 2002 rav4 4AWD make sound ("DUK DUK DUK") on the steering wheel

Hi

The noise from the front could be one of the drop links or one of the bottom ball joints amongst other things, and the noise from the back could indeed be a rear wheel bearing, and it could also be an underinflated tyre.

Very best regards

Geordie

SOURCE: Front wheel noise

Does this knocking noise mostly happen when you are turning the car? If so this is caused by a worn CV joint. It's not an expensive fix, but I would rather go to a mechanic than attempt it without prior knowledge of how to repair this. I hope this helps.

SOURCE: Humming noise comming from front left wheel area of 03 Sebring

it may be just sound of uneven wear of tyres

SOURCE: Pronounced noise as car slows down, tire thread? or wheel bearing on RAV4 1999

It is a wheel bearing issue. consider servicing your wheels and brakes.