What is that noise?

We noticed a strange squeaking, clicking sound coming from our van whenever we turned the wheel. We took it in, and they said we needed a new axle on the passenger side. So we replaced that, then another weird, faster clicking sound started. This seemed awfully coincidental to me, but they claimed it must be something else, like stiff coilovers that needed lubrication. But the sound would come and go, and of course it was always quiet when a mechanic would listen. The sound seemed to fade, so we didn't worry about it.

Fast forward a few months, and the original squeaking click is back. I feel like just giving up since it is such an old car... Hey - it's 12 years old, but only has 145,000 miles on it. Cars should last a lot longer than that. I guess we'll keep band-aiding it to get a few more years out of it.