Why Is My Car Shaking? | Why is My Car Vibrating?

Why is my Car Shaking?

In driving a car, you want a smooth ride while driving on the highway. Sometimes, the car starts to vibrate or shake due to some internal problems. If your car is also shaking or vibrating, it’s time to find out the vibration reason. Following are the major reasons for the shaking or vibrating car:

1) Car Vibrates due to Engine Problems

The car engine has multiple parts. If any part of the car engine fails, the car shaking issues may start. The engine air filters and spark plug are the major parts that generate car vibration issues.

If your vehicle is vibrating, firstly, inspect the spark plug and its other connections. Generally, a spark plug has approximately 78,000 to 100,001 miles of service life, but this varies according to the car model and brand type.

If there is no problem with the spark plug and its other connection are good, check the air filters.

The clogged or dirty air filters of the engine can generate oxygen lacking issues. Due to an insufficient supply of oxygen, the air and fuel will not mix properly. Due to insufficient air-fuel mixture supply, the engine couldn’t generate sufficient power according to the vehicle requirements. When the car doesn’t receive power according to its demand, it starts vibrating.

A damaged engine or radiator fan is also a major car shaking reason. As the damaged fan rotates, it becomes unbalanced and generates extensive vibration.

The latest cars contain an electric radiator fan that only works when the temperature of the radiator water becomes more than a fixed level.

2) Axle Problems

The latest cars mostly have two axles, one with the rear wheels and the other with the front wheels.

If any of these two axles has been dented or bent, your car may start to vibrate, which can lead to an accident or any other road incident. Generally, if your vehicle axle has been damaged, the vehicle vibration will increase as you increase the acceleration.  As you observe this problem, immediately replace your axle. In this way, you will be saved from expansive car repair or any other mishap.

3) Tire and Wheel Problems

In maximum cases, the car shaking problem occurs due to a tire or wheel problem. The tire or wheel generates vibration due to loose wheel nuts, wheel damage, tire roundness deviations, tread delamination, uneven tire wear, improper wheel, and tire balance.

You can avoid the problems of the wheel and tire by regularly inspecting, such as inspecting the wheel nuts tightness, adjusting the tire tube pressures, checking the wheels alignment, and visually inspecting the tires and wheels. In the regular maintenance of your car, you must also check:

  1. Tire pressure
  2. Lubrication of the wheels
  3. Wheels balancing
  4. Tires rotational behavior.

If you properly maintain all the above-given factors, there are high chances that your vehicle will not vibrate at any time.

4) Breaks need repair

If your car starts shaking when you hit the brake to slow down or stop your car, it is a sign that your brakes need repair. There are high chances that your brake rotor has been deformed due to driving wear and tear. This rotor installs in the wheels, and the brake pads push the rotor as you hit the brake to stop or slow down your car. If the brake surface is worn and uneven, the ride quality becomes shaky whenever you brake.

The stuck caliper is another brake-related problem that can generate a shaking issue in your car. The calipers have brake pads that push the rotor. If these pads get stuck, the car starts vibrating when it reaches up to a specific speed (usually up to 40 mph or 80 mph). If this problem occurs in your car, the shaking of your car will increase as you increase the speed.  

5) Suspension system requires some TLC

If your vehicle’s steering wheel is shaking, immediately look at your suspension system. You must immediately fix your suspension system; otherwise, it may cause serious problems and increase your repair cost. The most common suspension system problems occur due to ball joints, bearings, struts, shock absorbers, and tie rod.

6) Bent or Worn Parts

The car has multiple parts that wear out and cause car vibration. In addition, your car accident can cause the axle to bend, which may cause car vibration.  

A bent driveshaft or the worn constant velocity (CV) may also lead to car shaking issues.  

7) Low Transmission Fluid

If the transmission lubrication oil level in the car has become very low, it may start vibrating when you drive. This is very easy to fix, but you need to fix it as soon as possible.

If the transmission unit has a leakage issue and you continue to drive the vehicle using too little transmission fluid, it may lead to permanent damage to the transmission system. In this way, this can lead to an expansive repair or replacement of the transmission system.

As the transmission system is worn-out, you will hear extensive noise when the car shakes.

8) Worn Motor Mounts  

If your car is vibrating while idling, the engine mount can wear out or be damaged. In this case, the engine runs under the hood. By taking a quick look at its hood, you can easily identify this problem and fix it relatively easily and quickly.

Why Is My Car Shaking When I Brake?

The braking system is a most common reason for car shaking.  As you hit the brake, the brake pedal holds the rotor in place. As the brake pedal is pressed, the brake caliper exerts pressure on the brake pads.

The brake pads then push the rotor down to prevent the wheel from rotating. With the passage of time, dirt, dust, oil, or other contaminations can build up on the brake pads. These contaminations stuck the pads, which can cause car shaking, especially when the driver hit the brake pad.

In addition, the rotor becomes thinner and more prone to damage with its service life. The braking process generates extreme heat and deforms the rotor. This can also cause the brake pads to slip. Therefore, you must replace the brake rotors for approximately 71,000 miles to avoid this problem.

When you apply the brakes, you may hear a high-pitched noise from outside the car. This noise also indicates the worn brake pads. In this case, replace the brake pads immediately.

For the replacement, you must check the manufacturer manual for when to change your brake pads, but in general, you must change them every 49,000 miles.

Why Is My Car Shaking When I Drive?

If your car is shaking while you drive your car, your car may have the following problems:

In some cases, the car steering system starts vibrating due to the misalignment of the car wheels.  If the steering wheels are causing vibrations, you must take a look at your wheel’s alignment and fix it in case of misalignment.  If they come off the seats and floorboards, you will need tire balancing.

The wheels will be misaligned if the suspension components are at the wrong angle. If the weight of the car is not equally divided among the four tires, it will result in an imbalance. This inaccurate weight division of the car can cause extreme shaking, especially at more than 56 mph speeds.

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