Mazda 3 Owner's Manual page 316

When Driving
Parking Sensor System
Front Corner Sensor
Distance Detection area
Far distance
Middle distance
Close distance
*1 The rate at which the intermittent sound beeps increases as the vehicle approaches the obstruction.
NOTE
If an obstruction is detected in a zone for 6 seconds or more, the beep sound is stopped
(except for the close-distance zone). If the same obstruction is detected in another zone,
the corresponding beep sound is heard.
4–176 *Some models.
*
, Rear Corner Sensor
Distance between vehicle and obstruction
*
Front /Rear Corner Sensor
Approx. 50—38 cm (19—14 in)
Approx. 38—25 cm (14.0—9.8 in)
Within approx. 25 cm (9.8 in)
*1
Beeper sound
Medium intermittent sound
Fast intermittent sound
Continuous sound