Is my brake booster bad?

[TheManWithNoName]

I recently changed: brake pads, discs, rear brake cylinders and rear brake hardware. I did bleed the system. No air in it. I don't know if the sound was there before honestly. I wonder if I blew a seal in the brake cylinder when I pressed the brake piston.



I'm hearing this noise when the car is on. It's hard to describe the feel of the pedal. It's not as sharp as my girlfriends Toyota Camry. It's like not spongy, but close to it. It does brake tho. I press the pedal, I hear this sound, it feels spongy and then the car stops with no issues.

The booster is a bosh unit for some reason.

 

[CharlesHS]

That sounds like a vacuum pressure (air leak) .
When you depress the brake pedal and you hear that noise; do you hear a change in the engine RPMs ?

 

[MikeE024]

I recently changed: brake pads, discs, rear brake cylinders and rear brake hardware. I did bleed the system. No air in it. I don't know if the sound was there before honestly. I wonder if I blew a seal in the brake cylinder when I pressed the brake piston.



I'm hearing this noise when the car is on. It's hard to describe the feel of the pedal. It's not as sharp as my girlfriends Toyota Camry. It's like not spongy, but close to it. It does brake tho. I press the pedal, I hear this sound, it feels spongy and then the car stops with no issues.

The booster is a bosh unit for some reason.

That's your booster.

After my original booster failed, I installed an aftermarket replacement that went bad. It felt like I lost braking power and I had the whoosh noise you have. Soon after, my brakes wouldn't fully disengage unless I pulled up on the pedal after using my brakes.

All has been good with the second replacement.

 

[BC Moto]

Now I wonder if mine bad, I think I have a similar air sound when pressing on the brake pedal

 

[macleanflood]

I'm just planning on replacing mine with an iBooster.

-Mac