NHTSA Complaint #11561793 — 2017 ACURA MDX

i bought new car in 2017 November and around over 2500k miles I heard engine chirping sound and if you're surrounded by wall you can hear it louder. took it to dealership several time but they said it's normal and show me another car to prove to me. Which it did had same sound. Then yrs go by I hear loud clunking sound underneath the car every time I reversed and when switching gear to reverse. also about 1-2 yr owning it I heard clunking sound on steering wheel so when mechanic looked at dealership they said it could have been air bag wires so they secured it and shouldn't have any more problem. on 3rd yr I went back to dealership because I know something is wrong with steering wheel clunking sound when turning low speed to right and felt much tighter to turn. they said one of suspension is problem so they replaced but 2wks later happen again. I was in rush for them to resolve before my 4yr warranty ends but they keep playing around saying initially by experience mechanic when we did test drive he heard the sound and thinks it's steering rack or pinion. so I was relived after yr of back n forth they figured out and tells me to wait for next step. but after 1hr waiting at lobby they told me after lifting car up can't manipulate the sound again so can't fix. I wanted to speak to that mechanic again and the way he looked at me and said sorry I don't know what's wrong with it seem like his been told by higher up to lie bc that day they had corporate person visit and that person refused my claim. I asked to fix steering rack or both and they said we can't bc its costing them money and what if that's not the case. I took it to local mechanic and whenever my vehicle is lifted its hard to find the sound but when on ground you can hear. Then recently I brought up that clunk sound to different mechanic during oil change they found out that my body frame was loose so he tighten the bolts. He said it's rare to have frame loose. after that no more clunking when reversing.