I can't say I've had this issue, but then I've never had a new car, either. Indeed, I was initially tempted to crack something like: "New car? What is that?" LOL

But I can imagine that being in the interior of a new car can make some people feel sick. It may not be "bad smell" as such, but outgassing from all the new materials (like all the plastic they use).

I remember one writer talking about having sensitivity to outgassing with computers. IIRC, he actually had his laptop in a case that would isolate the computer from him (and somehow vent the chemicals and heat away from him). After a year or so, the outgassing wouldn't be so bad anymore, and he could use the laptop normally with no problems.

Do you have asthma?  Probably just a sensitivity to the chemical fumes emitted by the fabrics, carpeting, foam, and adhesives.  My 01 VW Bug smells like a crayola crayon...always has since new.  I googled it once and apparently they all did.  It doesn't bother me. Our new Lincoln smells so good.  Our former Escalade smelled like a brand new pair of expensive leather dress shoes.  I loved the smell of our last Mercedes but Tony hated it.  A friend at work can't stand the smell of her boyfriend's BMW.  My Mother's '08 Impala still pleasantly smells like it did when she got it brand new.  Think about it, new houses emit formaldehyde and other chemicals and some people get sick from them.  Would a car be any different?  We went to the Nashville Auto Show a few years ago and sat in a new Lexus IS model....it smelled like a horse barn!   I bought an old 1986 Chevy diesel truck  back in 2002.  It was a farm truck, was dusty and someone had smoked in it at some point.  I eventually installed new carpet and a new seat.  It then smelled like a brand new truck.  I loved it.