What is the damaged part in photo called? What else should I look at replacing. I looks like the bolts came loose and the piece that goes between pairs of bolts did this.

 

That's the boot used on the main drive shafts. Looks almost like it's been cut with a cut off wheel. I guess the spanner washer beat a hole in it. Trying to dig up a part number for ya.. Being part of the main shaft, they might be hard to find.

 

I think this is it. Pretty hard to find now that rebuild kits for the driveshafts have been dropped by a lot of folks..

https://www.ecstuning.com/Volkswagen...afts/ES405010/

 

this will fit my a4?

 

Just realized I didn't include vehicle details. Anyways your help led me to finding the part. Thank you much sir

 

It should. Most of those cars used the same bearings and such on either end. The only difference is the length of the shafts and some variations of the center support bearing. The drive shaft bearings and boots on my 87 5000S Q and 03 A8L are identical.