RT front wheel noise at low speed

K

kaiGross

New member
Hi -
I have a 2020 Z4 m40i with 33k miles. There is a “wub wub” noise coming only from the rt front, but only at slow speed and deceleration. At speed there is no noise and drives great. All 4 tires are brand new and balanced. All 4 brakes and rotors were replaced at the same time. Not 1 mechanic can figure out what is making the noise - the wheel is NOT bent. From different mechanics I was told it could be the rt strut or a wheel bearing. Does anyone have this issue or experienced anything similar? or possibly know what it might be. BMW can’t seem to figure it out. Any help would be much appreciated.
 
It sounds like the noise I had on my front offside, it was after seeing a YouTube video I found out what it was. I ran my hands around the inside and there were dips in the inner edge, they call it cupping. The only difference is that mine were older tyres but I think it had been damaged by the road surface as it was fine when I bought the car. Might not be the same but worth having a look. Also shining a torch on the tyre shows it up. :thumbsup:
 
Thx for your reply - are you referring to cupping of the tires ? / what is is cupping - that’s a new term to me
 
It’s an American term I think. If you run your fingers carefully around the inside of the tyre by the tread you might feel some little dips every so often, these are like little cups. When I changed the tyre the noise went away. Mine were 8 years old but hardly used by the previous owner and fine when I bought it. However it started as a low shs noise but became a loader wump wump noise. Yours are newer but perhaps it has been damaged on a ramp or pot hole.
Also try swapping them over and see if it moves to the other side.
 
MikeyH said:
It’s an American term I think. If you run your fingers carefully around the inside of the tyre by the tread you might feel some little dips every so often, these are like little cups. When I changed the tyre the noise went away. Mine were 8 years old but hardly used by the previous owner and fine when I bought it. However it started as a low shs noise but became a loader wump wump noise. Yours are newer but perhaps it has been damaged on a ramp or pot hole.
Also try swapping them over and see if it moves to the other side.
Click to expand...
I don't think you will be able to swap the wheels over as the tyres should be sided :!:
 
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