Mazda 3 Owner's Manual page 295

NOTE
The RVM warning indicator light may illuminate for stationary objects in or on the
edge of the road, such as guardrails, tunnels, and side walls.
Objects such as guardrails and concrete walls
running alongside the vehicle.
If a trailer is being towed or a vehicle carrier is equipped to the rear of the vehicle, the
rear vehicle monitoring system may not operate correctly because radar emission could
be obstructed. Turn off the rear vehicle monitoring system.
Rear Vehicle Monitoring (RVM) System
The walls at the entrance and exits of tunnels,
turnouts.
Places where the width between guardrails or
walls on each side of the vehicle narrows.
When Driving
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