I'm supposed to get my new 2012 elantra this Wednesday and I'm already planning for its upgrades. however, I'm pretty concerned about the warranty. This is my first brand new car and I want it to be as hassle free for as long as i can manage. I've had too many 2nd cars that keep breaking down on me and I want to avoid/reduce maintenance costs. I'm ok with taking it for PMS at the CASA though.

My question now is I still want to do upgrades to it - change the rims to 18", install a more decent sound setup, add fog lamps, etc. I'm not too concerned about the electricals, since the risk is small, but would upgrading my mags really have a great impact on the suspensions? How strong are the suspensions of the elantra anyway, or Korean cars for that matter?

My sisters husband have already upgraded their new Rio to 17" mags on its first week, and they weren't too concerned about it.