Park assist is an automated parking aid that helps drivers park with greater precision, using guidance system technology that rivals ultrasonic and other camera-based solutions with superior, advanced features. It is a system that has been fitted to cars for longer than many people may think, and it uses an array of sensors and cameras around the car that can judge how big a space is and can automatically park the car in it. The operation of park assist varies from car to car, but it is usually a pretty standard procedure. The car will find a parking space, and the driver will be instructed to change between forward and reverse gears and when to accelerate and brake. The car will then steer into the parking space, and some models will do the accelerator and brakes for the driver as well.

Park assist systems use computer processors that are tied to the vehicles sonar warning system feature, backup camera, and two additional forward sensors on the front side fenders. The sonar park sensors, known as "Intuitive Parking Assist" or "Lexus Park Assist," include multiple sensors on the forward and rear bumpers that detect obstacles, allowing the vehicle to sound warnings and calculate optimum steering angles during regular parking. When the sonar park sensors feature is used, the processor(s) calculate steering angle data, which is displayed on the navigation/camera touchscreen along with obstacle information. The Intelligent Parking Assist System expands on this capability and is accessible when the vehicle is shifted to reverse, which automatically activates the backup camera. When in reverse, the backup camera screen features parking buttons that can be used to activate automated parking procedures.

Park assist systems help drivers park with greater precision, reduce the frustration that comes with parallel parking, and minimize the chance for potential scratches and dings that happen when steering into very tight spaces. They also reduce the disruption to traffic flow in larger cities. The Enhanced Automatic Parking Assist feature can help drivers parallel or perpendicular park. This feature will steer and brake the vehicle in and out of spaces. It uses sensors along the vehicles front, rear, and sides to detect a parking spot and is designed to help drivers park alongside a detected vehicle or vehicles. Drivers must always be prepared to override the feature and take control.