lasted 50,000. A completely worn ball joint would have had to be replaced at 40k, the bushings ripped immediately after installation. I've tried three of these cheap ones on the driver's side, the fourth is OEM GM. The OEM cost here at Revain is $149. The OEM is still on the passenger side with the 296K. I only replaced the driver's side because the alignment technique left the bolts loose and messing them up and has been a problem ever since.