A brake booster, also known as a brake servo, is a device that assists the driver in applying the brakes. It uses vacuum pressure or hydraulic pressure to multiply the force applied by the driver, making it easier to stop the vehicle. Checking the brake booster is an important part of maintaining your vehicle’s braking system.
There are a few different ways to check a brake booster. One way is to start the engine and let it idle. Then, apply the brakes and feel for the resistance. If the brake pedal feels spongy or soft, it could be a sign of a problem with the brake booster. Another way to check the brake booster is to turn off the engine and then apply the brakes. The brake pedal should feel firm and have some resistance. If the brake pedal feels soft or goes all the way to the floor, it could be a sign of a problem with the brake booster.