Skip the auto shop - Our mechanics make house calls

Q: Knock sound while braking

asked by on

I always hear a knock sound when I brake my car. The sound come out of the left wheel

A: Hello. A knocking sound when braking is mos...

Hello. A knocking sound when braking is most likely from the brake pads moving inside the caliper bracket and the rotors having a warped surface causing the pad movement. The pads may be aftermarket and not fit tight enough in the caliper bracket. I would recommend having the pads replaced and the caliper brackets checked for wear on the pad contact surfaces and replace them if they are. Also replace the front rotors or have them resurfaced if they can be. If you would like to have this diagnosed for you, a certified technician from YourMechanic can inspect the brake system and let you know what repairs are 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・Fair and transparent pricing

Get a quote

What others are asking

Q: will an air compressor failure cause a diving issue

Hi there. The pulley bearing on the compressor may be bad and you might only need the new clutch and pulley if your A/C is still cold. You may not need the compressor unless the compressor is knocking inside in...

Q: Fuel pressure

Hi There, It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors. As you know, when you turn the key to on, the fuel pump is activated and the...

Q: No power to any components after doing my clutch

For your 2001 Volkswagen Jetta, you'll need to make sure all the large main fuses are not blown. You may not have identified the number 176 position. The fuse is a 110amp. It powers the inside main fuses. Check the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...