Mazda 3 Sedan 2020 Owner's Manual page 393

CAUTION
Do not install any accessories within the detection ranges of the sensors. It may
affect the system operation.
Depending on the type of obstruction and the surrounding conditions, the
detection range of a sensor may narrow, or the sensors may not be able to detect
obstructions.
NOTE
When the ignition is switched OFF, the system status before it was turned off is

maintained. For example, if the ignition is switched OFF while the parking sensor
is activated, the system will be activated when the ignition is switched ON the
next time.
The system may not operate normally under the following conditions:

Mud, ice, or snow is adhering to the sensor area (Returns to normal operation

when removed).
The sensor area is frozen (Returns to normal operation when the ice is thawed).

The sensor is covered by a hand.

The sensor is excessively shocked.

The vehicle is excessively tilted.

Under extremely hot or cold weather conditions.

The vehicle is driven on bumps, inclines, gravel, grating, or grass covered roads.

Anything which generates ultrasonic waves such as another vehicle's horn, the

engine sound of a motorcycle, the air brake sound of a large-sized vehicle, or
another vehicle's sensors approaches the vehicle.
The vehicle is driven in heavy rain or in road conditions causing water-splash.

A commercially-available fender pole or an antenna for a radio transmitter is

installed to the vehicle.
The vehicle is moving towards a tall or square curbstone, or a steep grade.

An obstruction is too close to the sensor.

The vehicle is moving towards an uneven wall or stairs.

There are multiple obstructions.

The vehicle is driven in a place with low ceilings.

Obstructions under the bumper cannot be detected. Obstructions which are

lower than the sensor or thin may not be detected even though they were
detected once.
The following types of obstructions may not be detected:

Thin objects such as wire, rope or poles

Things which absorb sonic waves easily such as cotton or snow

Angular shaped objects

Very tall objects, and those which are wide at the top

Small, short objects

Always have the system inspected at an Authorized Mazda Dealer if any shock is

applied to the bumpers, even in a minor accident. If the sensors are deviated, they
cannot detect obstructions.
Parking Sensor System
When Driving
4-239