My Sonata has 147,000 miles and my front suspension squeaks and groans.

I just replaced my struts when I have the same problem. I still have the squeaks and groans. I went back and the said I need to replace the upper control arm because the bushings are some how attached. It is $500 per side, plus alignment they quoted me.

I believe it may be your upper suspension arms bushes, i recently had mine done , just went and got 2nd hand low kms ones at fraction of cost. the squeaking was like bed springs everytime i hit tiniest bump