Q: Why sometimes car vibrates at low speed?

asked by on

Hi everyone. I purchased used Ford Focus 2012 a month ago and its mileage is around 40400 miles.

In the first week itself, I've noticed Screeeeeech sound while taking reverse and then applying brakes. The frequency of hearing this sound is very less.

And then after few weeks, I noticed huge vibration in steering for about 3 to 4 seconds while accelerating at lower gear.

And today, I noticed the same problem. The vibration is much greater than before and it happened when I apply brakes. The first vibration occurred when I slowed down in speed breaker and the second happened when I applied brakes during the turn and I was about to lose the control.

So, after noticing these things I went to mechanic explained him everything. Unfortunately, none of the things happened when he took the test drive.

Any idea what's going on with my car? I don't have even basic knowledge to I identify where the problem is.

Any help is appreciated.

Hi There, What you are describing is a sign of warped brake rotors. As you may know, when you press on your brake pedal, this activates a hydraulic pressure which forces small pistons inside your brake calipers to push the brake pads against the brake rotors which is what causes the stopping power you are familiar with. When this happens, an enormous amount of heat is generated due to the friction between the brake pads and rotors. As the brake rotors eventually cool down and then heat up again the next time you press on the brakes, over time this can cause them to warp slightly causing very small low spots on the surface of the brake rotor. When this happens and the brake pads are applied again to the rotors, this causes an uneven surface (on the rotor) to be applied to the flat surface brake pad, which can cause a vibration, shaking or very loud grinding sound. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your brake rotors.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Why sometimes car vibrates at low speed?

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: Burning smell from under the hood

Hello. A lot goes on under the hood and many of the components can reach high temperatures. Any fluid leaks coming into contact with these hot components can burn the fluids and cause an odor. An example would be a...

Q: hearing loud clicking when I accelerate, when foot off gas, reduced sound, sometimes step on gas and its gone

Hi there. In most cases, a tapping sound will come from two areas; the top of the motor or the axle shaft area. With the engine, the tapping noise is either lack of oil lubrication in the top of the...

Q: Car shakes for acceleration

Shaking or vibrating may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.