<P> An ignition interlock device or breath alcohol ignition interlock device ( IID and BAIID ) is a breathalyzer for an individual 's vehicle . It requires the driver to blow into a mouthpiece on the device before starting the vehicle . If the resultant breath - alcohol concentration analyzed result is greater than the programmed blood alcohol concentration ( which varies between countries ) , the device prevents the engine from being started . The interlock device is located inside the vehicle , near the driver 's seat , and is directly connected to the engine 's ignition system . </P>
<P> An ignition interlock device or breath alcohol ignition interlock device ( IID and BAIID ) is a breathalyzer for an individual 's vehicle . It requires the driver to blow into a mouthpiece on the device before starting the vehicle . If the resultant breath - alcohol concentration analyzed result is greater than the programmed blood alcohol concentration ( which varies between countries ) , the device prevents the engine from being started . The interlock device is located inside the vehicle , near the driver 's seat , and is directly connected to the engine 's ignition system . </P>
where does an ignition interlock device plug into
where does an ignition interlock device plug into
the engine 's ignition system
the engine 's ignition system