Having a bed bug infection in your car is extremely rare. However, if you suspect bed bugs in your automobile, check all of the cracks and crevices for any bed bug evidence. However, even if you don't find anything that doesn't rule out that they are there. What you can do is take your car to get fumigated. Other than that, the only thing that will absolutely kill the bugs is to let your car get very hot on a sunny, summer day.