JEO 
2017 Nissan Maxima Sedan 3.5 SV w/Prod. End 04/17 4dr Sedan (3.5L 6cyl CVT)
Crack Crack Crack!!!
 I don't recall if the car had a "cracking" noice when breaking to go in reverse or breaking as i go over speed bumps. The car had an "engine support".. replaced. The cracking sound went away for a few days, but it returned again. I have 20,000 miles in the car now. I just hope it doesn't run out of warranty before I am satisfy with the repairs needed.