2002 Pontiac Sunfire noise on front passenger side under car.

I had my 2002 Pontiac Sunfire in the repair shop because of a noise it was making in the right front passenger side of the car. I am sure since the struts were originals, they probably did need changed; however, they said the back struts are fine and don't need replaced.

They replaced the front struts and coils, but it still made the noise. So they replaced the arms or rods on both sides, and it still made the noise.

I had my son ride with me, he believes it is the CV boot or joint because he thought he heard a noise when I was turning the steering wheel and felt a slight vibration under his feet on the floor. I went and mentioned that to the guy who did the repairs, but he didn't know a Sunfire to have a CV anything, so he said.

His father, the owner, took it for a ride, and upon returning, tightened down the strut or something under the hood area of the car on the passenger side, and said if it continues, bring it back and they will replace the new right strut, etc, with other new ones because they may be defective. All of this, so far, has cost about a $1,100, and I still have the noise!

What is your opinion or suggestion?

Thank you for your help!