Abstract: An apparatus designed to be used in vehicles with automatic transmissions, to cause the engines to stall or cut-off if the driver leaves the vehicle while it is in drive or reverse. The apparatus features a sensor in a driver's seat and a sensor along a brake pedal, both connected to the vehicle's computer system and working in parallel for improving safety of a motorist. When the seat sensor indicates the seat has been vacated, and the brake sensor indicates the driver has removed his or her foot from the brake pedal while the vehicle is in D or R, a signal will be transmitted via the computer system to cut off the engine for improving safety of the motorist by preventing a possible accident.