2002 Spyder COWL SHAKE

I HAVE A 2002 SPYDER AND WHENEVER I HIT A BUMP THE CAR STARTS TO SHIMMY. I WAS TOLD THIS WAS GREATLY IMPROVED IN 2003. CAN ANYTHING BE DONE? WHENEVER SOMEONE IN THE CAR FEELS IT FOR THE FIRST TIME I GET SOME WISE CRACK LIKE "IS THAT NORMAL" OR I "I THINK YOUR CAR IS GOING TO FALL APART"

THANKS FOR ANY HELP.

JEFF