How Does The Parking Brake Work?

You've found a parking spot, but it's less than perfect—perhaps on a steep hill or unsure if your car's manual transmission will hold. That's where the parking brake comes into play. But hold on... is it called a parking brake or an emergency brake? What exactly is it designed to do, and how does it function? Dive into this explanation to understand how a parking brake works and what can go wrong.

What Is the Parking Brake?

In some vehicles, the parking brake is operated by a lever in the center console, while in others, it's an extra foot pedal located in the driver's footwell. Many modern cars feature a button on the console that electronically activates the parking brake. Regardless of the mechanism, the principle remains the same.

The parking brake functions like simple drum brakes, and in cars with rear drum brakes, these often serve as the parking brakes too. A robust steel cable connects the handle or pedal in the passenger compartment to the rear brakes. When you press the pedal or pull the handbrake, this cable activates the parking brakes on the rear wheels. An equalizer divides the single cable into two, ensuring even pressure is applied to both rear wheels.

But what do the parking brakes grip? When engaged, the parking brake forces the brake shoes to press firmly against the inner surface of a disc brake 'hat.' This friction keeps your car securely in place, preventing it from rolling away.

What Can Go Wrong with the Parking Brake?

If used properly and regularly, the components of the parking brake system will last a very long time – often through many other brake sets!

There are a few problems that can occur, however, especially related to improper use.

• Worn parking brake shoes: The parking brake shoes can wear out, just like normal brake pads. You’ll find this is often the case if the parking brake is accidentally left engaged for a long time or if it’s improperly adjusted.
• Seized cables: The parking brake cables need to move freely to engage and release the parking brake. Lack of use and lack of lubrication can lead to seized cables that mean the parking brake gets stuck engaged, won’t engage, or the cable breaks.
• Doesn’t hold tight: The parking brake should prevent your car from rolling when it’s engaged. If it doesn’t, the brake shoes may be worn out or the parking brake is out of adjustment.

Can the Parking Brake Be Repaired?

Most parking brake issues can be swiftly resolved by servicing the system, which involves lubricating and adjusting its components. If a cable is broken or seized, or if the parking brake shoes are worn out, they can be replaced just like any other parts of the braking system.

What Does a Parking Brake Repair Cost?

The cost typically ranges from $120 to over $1,000, depending on the complexity of the repair. If you're experiencing issues with your parking brake, you can easily schedule an appointment with a certified mechanic on AutoGuru. We offer instant quotes, transparent pricing, and a hassle-free experience!