My son does do extreme wheeling, only rolled once, now has a new cab and full exo cage, knows how to do watercrossings and limits! But summertime runs without doors so even an ECM inside may get wet in rain. He likes to watch drunk idiots wreck their trucks but likes his. Everything is vented up high, lowest point for a vent is motor, top of firewall and looped hose. We have done watercrossings to hood and window line... scary when water is moving and washing you sidways... this one local trail crosses same river several times but only 100 foot across, runs fast and high in spring!

He's been driving my off roader since 13 (now 18) with our club North Idaho Trail Blazers which is more middle age family guys that have wheeled for life. So he has had good teachers and lots of experiance and dosen't drink... He also hates mud bogging... but likes to watch drunks ruining their trucks every year at Moyie Mud Bogs.

Back to regular topic...

Doubt the underhood ECM would ever be under water, unless he made a mistake... but sure to get splased.

So the 7727 looks to be the choice so far. Want to do this at reasonble cost and duplicatable because of all the Toyotas locally that wheel.