After replacing my second set of break pads at 110k miles (still having original discs)- my discs warped significantly within about the first 3k miles (they had never warped in the least within 110 miles!). I brought the car back to my mechanic and he agreed the discs had suddenly become very warped and suggested that after 113k miles maybe they were due to be replaced- so I agreed to put new discs on. The new discs stopped smoothly with no grabbing at all initially. But after about another 3k on the new discs became significantly warped again. I brought the car back to my mechanic and he said he did not know why they might have warped so quickly and that maybe I was breaking too much hard/often. But regardless he agreed to replace them under warranty. These new discs stopped smoothly but became significantly warped again in ~3k miles. I brought it back again to my mechanic and he said that at this point, if it were his car, he would try replacing the hubs since warped hubs were likely the cause of the discs warping so quickly- he quoted $1,200 to replace both hubs.
Is he right? Should I just blow $1.2k to replace the hubs “in hopes” that will alleviate my brake rotor warping problem? Or can the hubs be easily tested to confirm they are bent before replacing them?
Can anything else (less expensive to try fixing) cause brake discs to warp super quickly (assuming normal brake usage)?
I am hesitant to drop $1,200 (about 1/4 the value of the car) at 116,000 miles…
Any ideas would be super appreciated!!