Yes, they do! A car breathalyzer is one of the last barriers to drunk driving prevention for DUI offenders who want to stay out of jail. A car breathalyzer, also known as an ignition interlock device, (or the Driver Alcohol Detection System for Safety) requires drivers to give a breath sample prior to starting their cars. If the breathalyzer detects a certain amount of alcohol, the car simply will not start. But by 2012 or so, in-car breath sniffers could be standard equipment in every new vehicle sold, force-fed to you by the tag team of Washington, Detroit and, Mothers Against Drunk Driving (MADD).