When space is at a premium, you'll find the guidance given by Toyota parking systems a big help in avoiding accidental scrapes. The Toyota parking aid system features ultrasonic sensors in the front and rear bumpers. These link to in-cabin alarms that grow progressively louder the closer you get to obstacles. Importantly, the front and rear alarms have different tones and can be switched off when not required. A cancellation switch is included for use when towing.