Reading a few posts of written off vehicles due to water getting into airboxes .
In many cases it appears that good effort is made to seal the snorkel fittings and the airbox valve.
When I installed a snorkel on a 2014 that there where 3 splay rivets holding the air direction duct inside the air box.
Each rivet has 3 small holes varying in size but I estimate each hole to be about 0.5mm2.
3 rivets each with 3 holes would equate to a hole around half a square centimetre.
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If the box was completely submerged it wouldnt take long for the airbox to fill up while engine running and the vacuum sucking water in. Of course, there are other big things to worry about if water is over the box, and good reason to question the airbox lid seal water tightness.
In any case - while I was at it sealing up the snorkel body I sealed up the airbox rivets with some sensor safe RTV.
If nothing else it would at least stop dust ingress
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