How often should control bushings need to be replaced ? I have already had them replaced twice. Last time in March 2019

Lower control arm bushings get replaced after they have been determined to be in need of replacement .. There is no known interval. Furthermore replacement is kinda rare in any event. I’d opt for another *hands-on* opinion from qualified personnel.

Hello, I don't see vehicle vibration at high speeds being caused by lower control arm bushings anyway. Consider wheel balance, for example, as a simple place to start. Good luck. www.repairpal.com/repair-shops