deliriousga

Is it possible to just replace the boot on the upper ball joint on an S4? The joint feels solid, but there is grease coming out of the side of the boot. I've searched through the forum and have found that the ball joint can't be replaced without the whole arm, and also that the lower boot can be replaced, but I can't find anything on the upper boot.

TIA!

cfc928gt

Yes they can be replace and I think at least one of the big three sells them. It's a boot from an Audi 5000S IIRC.

AO

Hi John. I recently got my parts from 928 Spec for this job. Have not tackled it yet, but plan to soon. It's a $50 vs. $800 job. I chose the $50 option.

FlyingDog

Audi part number is 431 407 377 A.

jpitman2

And use a proper ball joint tool to separate the joint please....many threads on what and where to get.
jp 83 Euro S AT 50k

Paul D

Here's an example of a proper ball joint seperator tool. It saves you from mashing the aluminum on the control arm if you are using pickle forks.



Heres a link to the website I bought mine from Ball Joint Lifter

Good luck!