What is a common method for ensuring your vehicle is secure when parked?

Always locking the doors is a fundamental practice for securing your vehicle when parked. This action creates a barrier that prevents unauthorized access, deterring potential theft or vandalism. Operating a vehicle often involves transferring valuable items, and leaving it unattended can make it susceptible to break-ins. By locking the doors, you reduce the chances of someone easily entering your vehicle and accessing any belongings.

Engaging hazard lights does serve a purpose, primarily to alert other drivers when the vehicle is stopped in an unusual situation, but it does not enhance the security of the vehicle itself. Using a push button ignition is related to starting the vehicle and doesn't contribute to its security when parked. Leaving windows slightly open can be risky, as it can provide an opportunity for someone to reach into the vehicle, compromising its security. Therefore, the most effective method among the options presented to ensure vehicle security is to always lock the doors when leaving the vehicle.