So when I'm driving my 04 530 I hear a lound knocking coming from the rear of my a car if you're inside it seems like right under the center console or just behind it. If you cruise at a constant speed you wont hear it, but as you press the accelerator it will get really wild ( maybe driveshaft related),I had similar probem on my 01 330 so I jacked it up and looked at me guibo and it looks pretty stout so I dont know what else it could be. Any ideas guys/gals

Thnks in advance
Tony

 

If your guibo looks good then check other items:
#8 Carrier Bearing
#12 U Joint
#17 CV Joint
Is the car high mileage or exposed to deep water at times?

 

I have about 105,000 miles on it no water tho. Thanks for the input. I'll check those out. U kno a site with a good break down view?

 

 

http://www.realoem.com/bmw/select.do

RealOEM is the sight where the driveshaft diagram came from. If you can't get your car on a lift to check the driveline
jack it up, safely, and have a look at those components. Also have a closer look at the guibo. I think it is the most prone
to wear.
Good luck and let us know what you find

 

check the propshaft bushes, i was getting a metalic clunk under hard acceleration and had to have the propshaft bushes replaced.

 

well Goin to put it on the lift today, and print out a few diagrams amd see what's going on. Hopefully I will se sum visible problem somewhere. Propshaft bushes is a new one. I'll definatly check that out though. Thanx

 

well guys its definatly the carrier bearing..its shot completely. Thanks for the help. Now I jus have stare at it long enough to figure out how im goin to get it out