I recently purchased a new 2018 HRV. The car ran fine for the first ~500 miles on a road trip (initial odometer was ~100 miles).
I tried to avoid as much bumpy road as possible, but inevitably the car hit some not-so-good roads.
I noticed some clanking sounds coming from the bottom as the car approached ~700/800 miles (precise mileage not clear).
I could not get the car examined at the time as I was in the middle of nowhere. The sounds coincided with the speed of the car, which made me REALLY worried.
The sounds lasted, perhaps ~100 miles (and off and on but definitely frequently audible).
But when I approached the next city where I could try to find a service dealer, the sound was gone.
Afterwards, at time, or simply my imagination or hearing hallucination, I could hear the sounds coming back but they never lasted long. (less than 5 or 10 min on the road).

Questions
1. should I get it checked up, even though technically there is no sounds.
2. what could be the problems and what I should pay attention to while driving to know if the problems persist, worsen, or disappear.
3. what should I know when I bring the car to the dealer for an inspection (if advisable).

This is my brand new car, so I am super worried. Any help will be appreciated. Thank you.

 

Keep driving and do not worry. Your car is still under warranty.

And good luck with your new car.

Sam