Mazda Mazda3 2019 Owner's Manual page 363

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
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 wing pole or an aerial 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 expert repairer, we recommend an Authorised

Mazda Repairer 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
4-237