Mazda 3 Owner's Manual page 242

Although the objects which activate the system are 4-wheeled vehicles, the radar sensor
could detect the following objects, determine them to be an obstruction, and operate the
Forward Obstruction Warning (FOW) system.
Objects on the road at the entrance to a curve (including guardrails and snow banks).
A vehicle appears in the opposite lane while cornering or rounding a curve.
When crossing a narrow bridge.
When passing under a low gate or through a tunnel or narrow gate.
When entering an underground parking area.
Metal objects, bumps, or protruding objects on the road.
If you suddenly come close to a vehicle ahead.
When driving in areas where there is high grass or forage.
Two-wheeled vehicles such as motorbikes or bicycles.
Pedestrians or non-metallic objects such as standing trees.
When the system operates, the user is notifi ed by the fl ashing warning light and the active
driving display.
The indicator light turns on when the system has a malfunction.
(page 4-22 )
Forward Obstruction Warning (FOW)
When Driving
4–117