hello! i drive a 2010 G37s coupe with 7k on it. i noticed it when i was stepping out of my car, i heard a popping sound like popcorn is popping. i think its coming from somewhere in the middle bottom of the car. its about 34 degrees outside that night. it happens every time when i shut off my car. i want to know if anyone else experienced the same problem. thanks in advance!

 

i think its ur cats popping ......it happens when they are cooling down..my car hasnt done it in a while tho

 

My '09 woth 20k miles on it does it. No big deal

 

When hot metal starts to cool down, it makes this noise. All cars/exhaust systems do this to some extent.

 

Both of my cars and my truck does that. No big deal.

 

oh ok. thanks guys! i didn't noticed when i had my 2005 RL. maybe it wasn't loud as the g37.

 

yeah most likely just the metal expanding/ contracting as it cools