So my father's '90 325i recently started making a humming/droning noise, almost like tire hum but much louder, above 40 mph. We replaced all the wheel bearings with Febi Bilstein brand last year, about the same time we bought new tires. The sound is entirely dependent on how fast the car is rolling (if you throw the car in neutral and coast there is no change in pitch or loudness), which leads me to believe its not a driveshaft issue. Could it be the CV axles? Or just a bum wheel bearing? Anything else I'm missing?
Edit 1/25/20: It was a bad wheel bearing after all. For anyone about to replace their wheel bearings maybe avoid Febi Bilstein, these were barely a year old. (I replaced the wheel bearings with FAG brand on my E30 about the same time and have not had any problems).
Edit 1/25/20: It was a bad wheel bearing after all. For anyone about to replace their wheel bearings maybe avoid Febi Bilstein, these were barely a year old. (I replaced the wheel bearings with FAG brand on my E30 about the same time and have not had any problems).
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