Today, most cars have seatbelt systems that have what’s called a “pre-crash locking system,” such as a locking latch plate or locking retractor. Older cars or, rarely, when a system is broken, additional steps must be taken to ensure a car seat is secure in the vehicle. Below are guidelines on how to install a car seat in the various ways. Please contact a local car seat technician to ensure your child’s car seat is installed as safe as possible.