wpoet

I have a 2006 Acura CSX, about 170,000 km. Recently, there's been a strange noise. At low speeds, less than 50 km/h, there is often a loud humming/squeaking noise coming from the right rear side, almost like the sound that tires make when driving over the grilling of a steel bridge. I recently had the brakes replaced, and the mechanic thought it might have been a rotor problem, but after he reshaped the rotors, the sound continued. Any ideas? Could this be a ball joint issue? Or something else? The sound only began after the rear brakes were replaced, I believe.

TylerT

iTrader: (1)

Does the sound vary with speed?

To me, any humming noise is a good indicator of being a bad wheel bearing.

I would also check your brake rotor shield to make sure it's not making contact with the rotor itself.

wpoet

Thanks for the ideas, TylerT. The sound doesn't vary with speed. I'll check out the two problems you suggested and let you know the results.

wpoet

The problem was a faulty rotor/brake on rear right side. The mechanic replaced both rear rotors and problem went away.

wpoet

Dang, spoke too soon. Two days after replacing the rotors/brakes, there was a very loud groaning sound coming from the right back wheel. Only happens when starting the car after a rest of a few hours; after a few minutes, the sound goes away. Any ideas? I'll take the car back to the mechanic tomorrow, sigh. At least the brakes are under warranty.