Possible car problem(?) question

[ironxman99]

hi guys, i don't know much about cars so just seeking some quick advice.

i just bought a new 4runner and i've put about 500 miles on it. i noticed that when i press my brakes, there's a slight suction/hissing sound. it only happens when i intially press them, not when i continue to push it down. also, if the brakes are partially pressed and i simply push harder its fine. it only happens on the initial pressure.

the brakes seem to be working fine - i don't need to push it overly hard, nor do they seem abnormally sensitive. i'm not sure if this has been going on since i bought it because i just noticed it (usually the windows are open or the radios blaring so i wouldn't have heard it). its just annoying to hear a hiss every time i press the brakes, esp when its quiet. or is this a bigger potential problem?

thanks in advance.

 

[slikmunks]

my pops' suburban had the same thing, i think it might be the hydraulics in the brake system... nothing to worry about...

and um, if you bought a new 4runner w/ 500 mi on it and you're worried about something, take it back to the dealership and get it checked under warranty.

turn up ur radio that will help with the noise

 

[ironxman99]

yea, i just don't want to waste a couple hours of my day off at the dealer if its nothing to worry about.

 

[ironxman99]

anyone w/ extensive car knowledge have a clue?

 

[IronWing]

My FJ does the same thing. It seems to be the hydraulics activating. No brake problems at 4500 miles.

Edit: I believe the 07 FJ and 4Runner share the same braking system.

 

[thomsbrain]

Originally posted by: ironwing
My FJ does the same thing. It seems to be the hydraulics activating. No brake problems at 4500 miles.

Edit: I believe the 07 FJ and 4Runner share the same braking system.

they probably do share brakings systems, since they share platforms.

 

[ironxman99]

thanks for the response guys. my friend who also owns a recent model 4runner said he took it to the dealer and they said its normal.