My brake cylinder makes noise when I start the car up. It sounds like it's squirting something (think eletronic water gun sound). This happens 2-3 times for a couple second and then goes away

I notice no issues with the brakes. Any idea was this is and whether I should be worried?

Thanks

 

first off..what do you drive? lmao yeah.....same thing happens to my car it sounds like a water gun i swear but as the driver i bet you're the only one that hears it......i tell everyone but they think im crazy haha actually its normal....because newer lexus models have the "advanced abs system" and are "testing itself" as it says in your owner's manual....you get used to it man