Like the title states, my wife's 2019 Rdx is making a consistent sloshing of fluid sound coming from behind the dash when under hard braking and its especially noticeable when on an incline or decline.

Has anyone else dealt with this?

No sign of water in the vehicle and I've checked the following :

Coolant system for trapped air in the pipes or heater core - none

Took vehicle to a local Honda dealer and they blew out the AC drain line and checked the sunroof and water drains - all seems normal.

They removed A pillar and door panels, inspected under the dash and it all seems dry.

I'm at a real loss here... Have an appointment with acura in a couple weeks to do a deep dive, but I know that's going to be costly.

Any ideas or suggestions would be welcomed! Thanks.

 

Bottle of water left in the glovebox?

 

Sound can travel in the cabin…Check under seats for water bottle and take sunglasses out of overhead console. Sunglasses were rolling back and forth in my overhead console before I lined it with stick on foam.

 

Thanks for the suggestions, I ruled all those out first.

I do have an appointment at Acura on the 20th to see what's going on, I'll keep this thread updated.