Hello, I have a question, and I have a surrising sound with my Mazda 323 FBJ which only occurs at 80kmh. I had read once, that you can determine at low speeds whether a wheel bearing is defective. How do I determine exactly if it is really the wheel bearing and if so which side. Because it is not cheap. A bearing for the rear costs with hub almost 50€ at Ebay and approx. 80-100€ at the friendly Mazda dealer. If then I do the ga nze pairwise, but I would be even more interested if it really are wheel bearings. It is only to be heard at higher speeds and only then. Has nothing to do with motor or something. So idle at 100kmh the noise is still there. But maybe it is also due to a clattering or loose cunt part where the wind goes through and causes a surrative noise. With a 12 year old car a lot can happen.