Hello Everyone,

I do have an Hatchback Astra J 2015 1.4NET with auto transmission. 

I did detected a flapping noise like as you are driving something stick on the tires or it sounds like there is some lines on the road and you are passing on them. 

I know it's a very low chance find this kind of a sound issue without hearing it but I'm out of ideas to tell to service to check. 

So I made below checks and fixes: 

- When I first noticed the sound I re-balanced the summer tires on th