Hey guys I am new here just bought a 2008 g37s.
First issue with the G the thigh extender does not "catch". If you push it in it just pops back out again. Anyone know the problem/ fix? don't want to spend $ at the dealership

 

I've not had that issue but my lower air bags stopped inflating! Sucks. lol

 

Probably just a broken or stuck catch; stick your head under there and take a look...