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RAB kicked in this morning twice trying to back out of my driveway. Nothing behind me other than a lot of white exhaust (much more than normal). Is the RAB visual at all, or is it all based on radar? I cannot imagine the exhaust registering on the radar.

The parking sensors on my old pathfinders ('13 and '15) would stop working when it they had a little ice on them. Perhaps that was the issue versus the cloud of exhaust.

Certainly woke me up for my drive this morning.
 

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I believe it is optical too. When you are in reverse, and the RAB detects a potential obstacle, it highlights that obstacle on the display in yellow (first as a caution), and then in red (as a warning). If you are driving slow enough (either below 3mph or 5mph I think), you can still proceed thru the alerts.
 
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