Hi Toadster - it could be the ball joint at the bottom of the arm/knuckle you would have to ask the garage. I dont think Honda ever sold the ball joint on its own - you had to buy a whole new assembly - so there wont be a honda part number. There will be something aftermarket that fits. I know you can use a lower ball joint from a Honda Legend on the front of 4th gen....
Here is some info I found:
Info was from a post by Rich at Performance Autoworks:
Not much time so just a quick post
4th and 5th gen front and rear lower ball joints are the same 110%

4th gen front and rear uppers are 33mm ball joints (OEM)
5th gen front uppers are 35mm and rears are 33mm (OEM)