Years ago the “new car smell” was found to cause people to experience a sick feeling. The odor that causes the new car smell is made up of volatile organic compounds and other toxic chemicals from glues, paints, vinyl and plastics inside new cars. Those ‘gas out fumes’ can cause headaches, sore throats, nausea and drowsiness—some folks even can experience dizziness or lethargy.
“Probably the most recent of these studies was conducted in February of 2012 by a non-profit group called the Ecology Center. Their “Model Year 2011/2012 Guide to New Vehicles” (which you can download in PDF format here) is unequivocal on the issue: ‘[T]hese chemicals [in new car smell] can be harmful when inhaled or ingested and may lead to severe health impacts such as birth defects, learning disabilities and cancer. Since the average American spends more than 1.5 hours in a car every day, toxic chemical exposure inside vehicles is becoming a major source of potential indoor air pollution’.” 
Fast forward to the newer cars with all their electronic technology, which apparently emits electromagnetic frequencies, and we find that new car occupants experience equally-distressing symptoms such as vertigo, nausea, headaches and migraines—those ‘killer-type’ headaches.
Check out the stories about new car sicknesses that probably may be due to electromagnetic frequencies causing what’s known as electrohypersensitivity, or medically referred to as “EHS”. This site discusses EHS and its symptoms. There are primary and secondary symptoms, which everyone ought to become familiar with because of the ‘ocean’ of frequencies we are living in, plus the EMFs emitted from all smart ZigBee-chipped gadgets, specifically cell and iPhones, and utility companies’ AMI Smart Meters.
Wi-Fi in school or at work can be debilitating for those exposed to it, compromising them with EHS symptoms. Could Wi-Fi be the cause of what’s affecting the folks in the stories reported in “Carsickness complaints: Family is ‘miserable,’ company aware of concerns.”?
AMI Smart Meters retrofitted on to a home’s utilities, e.g., electric, natural gas and municipal water, also can compromise an individual with EHS .
Here’s a video regarding testing methods for EHS in individuals that explains how things are done.
The World Health Organization (WHO) publishes “Electromagnetic Fields and Health” in English here.
The WHO also publishes that information in twelve languages, which can be found here.
However, I think if you have an older car without technology updates, you may want to hang on to it and take good care of it so it can last ‘forever’, since all the new technology in today’s cars just may not be worth the price you have to pay not only in hard-earned cash, but health-wise.