01 Olds Alero bearings?

what conditons are your vechicle put through every day,pot holes,bumpy roads all factor in to the life of your bearings,the next question is what brand of bearing are you using,Factory bearings tend to last longer,There has been alot of time and money spent to engineer these vechicles from GM.Hope i helped.

I put in four sets under 100k and found that the aftermarket bearings, while cheaper, don't last.