Originally Posted by Gearhead999s
You will usually hear a low rumbling sound and some vibration when the offending wheel is loaded ...
Word of caution -- "usually," but not always. A friend of mine recently changed a bad bearing that was actually the 'off-side' bearing, on his E36.
Had X1/9s back when, and they could fool you completely -- changed both fronts once, when it was a rear bearing howling.