2008 Toyota Prius Q&A

2008 Toyota Prius Question: When I stop on an incline and then accelerate, I hear a water drop noise.

It doesn't sound like rushing water or pooled water, just a single drop sound. -
Answer 1
you must have really good hearing i would check all your fluid levels. possible wipper washer fluid ps i love my prius -
Answer 2
I have heard the same single-drop sound. It's almost like a recording of a water-drop sound effect: "bwop." It's from the rear right part of the car. It comes only sporadically, and it's too loud to be an actual fluid. -
Comment 1
Exactly! Any luck determining the cause? -
Comment 2
Not yet. My mechanic's never heard of this. Have you asked a dealer's mechanic? -
Comment 3
Not yet. I believe it started after I took it in for the 90k mile service. I have an appointment in a few weeks, so I will ask them. -
Comment 4
Did you ever find out? I'm having the exact same issue: A recorded-sounding electronic "bwop" sound (like an old Apple Mac "droplet" sound) that comes from the right rear on my 2007 Prius, which currently has 95K on it. It's sporadic, and I can't figure out it's relationship to braking or inclines. -
Comment 5
My 2009 Prius which has only 65,000 miles also makes this electronic "water droplet" sound. It's not actually water just sounds like it. Anyone figure it out yet? -
Comment 6
My husband thinks it is a gas releasing from the battery, which is in that location. I think it happens mostly in the warmer weather. -