Quote:
Originally Posted by Zoich
I have a brake service due. Can you share with us what prompted you to believe that your wheel bearing were shot? What were the symptoms? My Dunlops run-flats are loud enough that I can't hear the bearing if it's going bad. Other tell-tale signs?
Thanks.
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There is no easy and yet reliable method to diagnose a shot bearing. Reliable methods involve lifting the vehicle and using a stethoscope or swapping tires with a set of quiet ones.
Less reliable symptoms are:
- If the noise changes as the gears change, it is not wheel bearings.
- If the noise intensity and pitch do not change as the vehicle speed varies, it is not wheel bearings.
- If the noise pattern changes when the road surface does, it is not wheel bearings.
If none of the above is true and you can point out the direction the noise is coming from, rather than having the noise coming from all directions, it is likely to be a wheel bearing.
When I brought my X5 in for the first time, all of the above lined up. However, on my second service visit I still could not determine the likely direction the noise is coming from but the service department was able to determine that it is a faulty bearing. They probably employed more sophisticated and reliable techniques compared to mine. I would be surprised if they didn't