Why Subaru Forester Shakes At High Speeds?

When driving your car and it begins to shake or vibrate, It indicates an issue you have to fix to avoid further damage. Don’t worry here you will learn why subaru forester shakes at high speeds ?

What Causes Subaru Forester Shakes At High Speeds?

The major causes of your Subaru Forester shaking at high speed are unbalanced wheels, twisted wheels, damaged tires, a bent rim, and bad wheel bearing. The other rare reasons include a bad axle, old suspension, or tire pressure that was not properly done.

1. Misaligned Wheels

A bad alignment of your wheels can cause vibrations in your Subaru Forester. The importance of good wheel alignment is often underestimated when maintaining a vehicle. Potholes and curbs can easily misalign your wheels, causing you to have poor control of your vehicle and making your tire wear out easily.

The most evident indicator of the wheels in your Subaru Forester not being properly aligned is when you notice the vehicle pulls to one side, and you are compelled to always adjust the steering wheel to keep it intact. Having unbalanced or worn-out tires or a shaky steering wheel when driving straight are some of the additional indicators.

2. Rim Damage

A bent rim can cause vibrations in your Subaru Forester. When impediments such as curbs, speed breakers, or deep potholes are driven over too fast, this type of damage occurs. This causes vibration, which is most noticeable as you’re going at a very high speed.

3. Uneven Wheels

When you are driving at high speed, if you notice your Subaru Forester is vibrating, you might have an unbalanced wheel, especially when the steering wheel wobbles or rattles. When only the front wheels are out of alignment, the vibration is generally heaviest at the steering wheel. If the rear wheels are out of balance, vibrations can be felt throughout the vehicle’s body.

Uneven tire wear and contact with potholes or objects are the most common causes of uneven wheels in your Forester. This causes the edge and centre of the tire’s gravity to shift unevenly.

Why Does Subaru Forester Shakes When Accelerating?

There are quite a few reasons that your Forester would shake when accelerating.  Here are the most common ones.  They are presented in a somewhat logical progression.

1. Bad Motor Mount

The motor mount is responsible for connecting the Subaru Forester’s motor to the chassis.  It also needs to absorb a significant amount of vibration.  There are a few different types of motor mounts, but the most common kind uses rubber bushing to dampen the vibration.

If the motor mount goes out, the vehicle will shake quite a bit when you accelerate.  It can still get worse though.  A motor mount that has broken will allow the engine to roll around under the hood, and you’ll hear a clunking sound.

2. Inner CV Joint

The CV joint is responsible for sending power to the front wheels of both front-wheel and all/four-wheel-drive vehicles.  The inner CV joint is most likely to be the part of the CV shaft that has gone bad.

More often than not, a bad CV joint is caused by a torn boot.  The protective boot goes over the CV joint and keeps oil in and debris out.  It is really easy to tell if the boot is bad.  Just take a look.  There will likely be grease all over the undercarriage around the boot.  The boot shown above has a small tear.

3. Driveshaft

Rear-wheel drive and all-wheel drive vehicles use a driveshaft to transfer power from the engine to the rear wheels.  The driveshaft is a simple tube that connects the transmission to the rear axle.

The driveshaft itself can get bent.  It is much more likely that a universal joint has gone bad.  The universal joint has to change the direction in which something spins.

Look at the diagram below.  As it wears out, there will be play between it and the driveshaft, which causes shaking when accelerating, and consistent shaking at certain speeds.

How to Stop Subaru Forester From Shaking While Driving?

Follow the below steps to fix Subaru Forester vibration issues.

1. Align Your Wheels Properly

Electrical diagnostic instruments are usually used to perform wheel alignment. A computer system recognizes how real values differ from the target values using sensors fitted to Forester’s wheels.

The target values are the manufacturer-specified standardized values. The measured results may be compared on a computer, and deviations can be readily evaluated and remedied.

2. Fix The Suspension

To elude more problems, repair your car’s suspension if it is damaged. A tie rod, spring, or control arm may be broken if your car slides.

This will make the activity of steering to be difficult and influence your ability to manage the automobile in ways that go beyond a simple drift or pull. Make an appointment with a mechanic right away to have it repaired.

Should I Keep Driving If My Car is Shaking?

Your car shaking when driving can occur only when you drive at specific speeds. Nonetheless, it could also happen at even low speed. Don’t ignore extreme vibrations or the way your vehicle wobbles and shakes. If the brake in your vehicle isn’t working properly, you shouldn’t keep driving. Take it to an auto mechanic for repair.


When you notice your Subaru Forester is acting more unusual than normal, consult your mechanic or replace damaged parts of your car for your safety.

Hope the above-mentioned information helps you to understand why subaru forester shakes at high speeds. If you have any queries with the methods then leave a comment below we will get back to you as soon as possible.


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