My wife's 2008 Fit Sport has developed a noise inside the dashboard like rolling ball bearings or bubbles in liquid. It's noticeable when accelerating (the noise comes towards the driver) or braking to a stop (the noise moves away from the driver). It never happens going round bends; the sound is always front-to-back but never side-to-side. Started a few months ago as a "single" object but now it's sounds like a half dozen objects are rolling back and forth.

We removed everything from the storage bins: no affect. We removed the the windshield cowl in case it's the windshield washer fluid sloshing around; again no change and all is bone dry behind the dashboard.

Any ideas before I (grudgingly) go to the dealer? The car has 25,000 miles and no prior issues.

 

I have been under and into the dash of my car numerous times and the only thing that I can think of is that if you have ever let a kid in the front seat unattended they may have put something small and round into one of the A/C vents.

 

Are you sure it's not from the gas tank? underneath the front seats...

 

It's probably air bubbles in your cooling system. It happened to me as well. I can't remember if there's a bleeder screw or if i just bled it by starting the car with the radiator cap off and letting it run. Someone else on this forum will have that answer for you though.

 

... air bubbles in the cooling system. The overflow tank was nearly empty and the system needed ~20fl.oz. The noise was probably air bubbles in the heater core.

I also added 1oz of U/V die to identify if there's a leak ... and where. I'll also be checking the coolant level more often. The MAX/MIN level is difficult to see on the well-hidden tank!

I'll report back before next year!

 

^i had the same noise problem with my '08. i soon realized it was the gas in the tank sloshing around. the tank is underneath the front seats.