7 Causes of Car Shakes When Idle, Accelerating, Driving and Braking


A normal car will not shake. It will provide the driver and passengers with a smooth and steady experience. So, whenever you experience shakiness coming from your car, it is never a good sign. It doesn’t matter if your car is idle, accelerating, driving, or braking. Any time you experience car shakes while you’re in the car, there must be something wrong with one of its components or parts. Fortunately, shaking rarely means there is a problem with the engine. It just means there is a problem with a component that the engine relies on.

The Top 7 Causes

You will experience shakiness at all different times when you’re in a car. Sometimes it’ll happen during all instances of idling, accelerating, driving, and braking, while other times it will just happen during one or more of these instances. Unless you know the common causes of car shaking, you will never be able to figure out the likely cause of it. Most of the time, the cause is easy to fix and will just require replacing one part.

Read also: 5 Symptoms of Low Transmission Fluid: Manual and Automatic

Below are the top 7 causes of car shakes when idle, accelerating, driving, and braking.

  1. Bad Engine Mount (Idle, Accelerating and Driving) – The engine mount is what connects the vehicle’s engine to the rest of the body of the car. The mount is also designed to absorb vibrations and shocks that come from driving on the road. This same mount also connects the transmission to the body as well. As you can see, the mount is very important for the vehicle. If it were to become too worn out or damaged, then the entire body of the vehicle will vibrate all the time.
  2. Worn Tire Treads (Driving) – The only parts of the vehicle which touch the ground are the tires. Each tire has treads on them which grip the ground better, so that the vehicle can have better traction and stability. However, tire treads are some of the most vulnerable areas of a vehicle because they’re constantly spinning on the ground. This means the treads will get worn out very fast and turn flat. Once this happens, you’re going to experience lots of shakiness which will only get more intense as you accelerate faster in the vehicle. Therefore, you will need to replace your worn tires with new ones.
  3. Bent Brake Rotor (Braking and Driving) – If you have a bent brake rotor in your braking system, then the brake pads as well as the calipers can’t function properly. When you step on the brake pedal to slow down the vehicle in this situation, the brake rotors won’t be receiving the proper pressure to slow the wheels down quickly. Instead, you will experience lots of shakiness as the vehicle takes its time to slow down in response to the pressure on the brake pedal.
  4. Loose Wheel Bearings (Driving) – Wheel bearings lubricate the wheels of your vehicle to prevent them from generating a lot of heat. If the wheel bearings become too loose, you will experience shakiness coming from the wheels. It will also make your vehicle less stable, so you don’t want to let this go unrepaired for too long.
  5. Bad Propeller Shaft (Driving) – Rear-wheel drive vehicles have a propeller shaft which delivers power from the engine to the rear wheels. If you’re driving a rear-wheel drive vehicle and your propeller shaft becomes faulty, then the entire vehicle will shake.
  6. Bent Axles (Driving) – If you have bent axles in your vehicle, then it will cause shakiness and vibrations. The car shakes will intensify as you accelerate faster. Axles can get bent if you regularly drive over rough terrain or bumpy roads.
  7. Brake Caliper Stickiness (Braking and Driving) – A brake caliper is used regularly in a vehicle. If it ever starts to stick, then your vehicle will begin shaking. This shakiness will get worse as you go faster or step on the brake pedal.

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