Hi, I've had this F20 for almost a year but has started a rumble noise and I can feel it to. 

Basically this rumble comes from the rear left when under hard acceleration at only certain revs, I'm thinking a bad drive shaft maybe ? 

I have a few other things in mind that it could be but thought I'd give this a go to see if anyone knows the exact problem to save me waisting time looking at the wrong culprits 😅

Thanks in advance and hope you all enjoyed Christmas 👍

Morning Carl

Welcome to the Forum

Without hearing/feeling the noise we are all guessing in the dark

First stop for me would be check the Wheel and Tyre, then the Wheel Bearing and Carrier, then the Drive shaft 

The fun part is if your doing one side don't forget the other side if your in there changing major parts I would buy a rebuild kit and do the rear suspension as well 

Have a great Christmas

Dave

Thanks for the information Dave, I've already replaced the shocks as they were overdue and the coils look newish with no rust or hairline cracks.

I'll see if I can get a recording of the noise and upload it here. I've got plenty of time to find the problem as I don't go back to work until the second week of January.

One thing I didn't mention previously it the car is quite hi milage 150k but had a timing chain fitted not long before I purchase the car, so a thought is just to replace the drive shafts ect.... But if not needed why waste money but on the other hand I could end up replacing parts that need doing then 500 miles down the road something on the other side of new parts might need doing. 

Anyway I'll see if I can get the noise recorded and post it.

Thanks again 👍 

Hi Carl

Normally a wheel bearing can be heard louder when under load left or right turns. So left side should be louder on a roundabout

If it is under acceleration load it could be Diff related, have you checked it for leaks and maybe top it up to see if that helps. If the diff leaks then a top up will only be a temporary fix though

Dave