Skip the auto shop - Our mechanics make house calls

Q: What could be the cause of a loud roaring noise when I apply my brakes?

asked by on

For the past couple of days, when I drive, it makes a low rumble while I drive. When I start to gently apply the brakes it makes a loud roar similar to an airplane taking off. The noise is coming from the rear of the vehicle and it is not similar to that of a squeak or a squeal, which would be present for a brake pad issue. I have been braking as little as possible, but when I do, I make sure that I do it as gently as possible so as to not put any stress on them. I do a lot of driving to and from work (approximately 80 miles per day). The road that I live on is bumpy but the rest of the way to work is paved. There is nothing that appears to be hanging down from the underside of the vehicle and the tires appear to be fine.
My car has an automatic transmission.

A: Hi there. Typically, there are two mechanic...

Hi there. Typically, there are two mechanical parts that can cause this type of noise as they begin to wear out. The first and most common culprit is brake pads that have worn and are actually grinding on the rotor. This is a very unsafe situation and should be repaired as soon as possible. The second is typically worn out wheel bearings. The roaring sound in this case is caused by a lack of lubrication inside the spindle. In either case, I'd recommend contacting a certified technician, such as one from YourMechanic, who can complete an inspection of the vehicle to diagnose your noise problem and recommend the right repairs.

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: power steering problem.

Hello. Noise could be a sign of trapped air, low fluid level, or a mechanical fault in the pump. While the system is cold, check the fluid level. If the fluid level is OK, remove the cap and turn the...

Q: Clunking noises driving at low speeds or over bumps

A clunking noise when hitting bumps can be caused by worn out struts, worn strut mounts, sway bar bushings, steering linkage being worn, or loose components. It would be best to have a certified mechanic actually diagnose the noise. These...

Q: Loud turns after driving awhile

If the whining noise is occurring as you turn the steering wheel, it could be the power steering pump failing and/or the drive belt on the pump is loose, worn, or glazed. Such noises are never "normal" and are not...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...