Skip the auto shop - Our mechanics make house calls

Q: Hissing and squealing when releasing brake pedal

asked by on

I think the brake power booster might need to be replaced. i can hear a high-pitched hissing or squealing sound when I release the brake pedal.

A: That is the sound that the brake boosters w...

That is the sound that the brake boosters will make as the seals for the diaphragm are worn out. I would recommend having a certified technician come out and determine if that is in fact the problem you're having and replace the brake booster as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Oil pan came off

It is highly unlikely that your oil pan came off. It is possible that it may have a hole in it due to some road debris, or perhaps the oil filter may have come loose slightly causing oil to leak...

Q: Jeep Liberty ABS brakes?

When you start your car or turn on the key do you have a yellow light that says ABS in it? If you do then you have ABS and you should order the hub with ABS. If an ABS light...

Q: Changed my brake pads, now there is a grinding noise and the brake is spongy

The grinding noise you may be hearing may be a sign of worn out brake pads grinding on the brake rotors. When the brake pads wear down beyond a specific measurement, this kind of sound is common and may also...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...