In March 2011 (200,000 mi.), my S430 needed a new left lower balljoint that the dealer installed. Today (at 236,000 miles) the dealer tells me I need a new one. They didn't say anything about obvious damage. I agree with the diagnosis (I've heard bad balljoints before), but I'm astounded that one can go bad so quickly. The right side was done the year before, and seems to be fine.

Can a non-defective balljoint go bad that quickly (no accidents, etc.)?

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1996 C280 289K Traded
1997 E420 167K Traded
2001 S430 240K Traded
2010 E550 4matic 80K
2000 GMC Jimmy 198K Gone to Boneyard
2003 Camry LE 196K
2011 Mazda3 i Sport 31K