Well...here it is. I took out the wishbone control arm. The ball joint in it is of course very "loose" feeling--but I'm not sure how that would translate into a bad control arm. I cant feel any clicking, of course, in my hand when i'm articulating the ball joint with my fingers.

In comparison, the front tiny control arm was much stiffer articulating the joint on it.

How else would I even be able to prove the wishbone is bad just because the joint feels really loose? Is that grounds for a bad joint?

P.S. I looked up what I bought, and it is REIN brand. They were $55 for each side. Let's see if I can try with the 2 year warranty...

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2003 BMW X5 3.0i -- MT5, 3.64s final gears, H&R lowering springs, K-Mac bushing kit
2007 BMW X3 3.0Si -- MT6