When a Car’s Rear Brakes Fail: Safety, Consequences, and Maintenance

If the rear brakes on a car fail, the vehicle will likely skid. This is because the front brakes are doing most of the braking, while the rear brakes are not providing any additional slowing force. In some cases, the car may even spin out.

Consequences of Inoperable Rear Brakes

If the front brakes still function, the car will eventually come to a stop. However, this can result in significant wear and damage to the front brakes. When a vehicle is forced to decelerate using only the front brakes, the weight transfer can cause additional stress on the front brake components, such as the rotors and pads, potentially leading to more frequent replacements.

Impaired Stopping Power and Extended Stopping Distance

When rear brakes are inoperable, you are risking damage to the brakes further, or they may fail completely. Rear brakes provide approximately 40% of the overall stopping power, making it unsafe to drive once they have failed. Additionally, this could potentially render features like Anti-lock Braking System (ABS) and stability control ineffective, thereby increasing the risk during panic stops.

It is important to note that rear brakes do less work than front brakes in normal driving conditions, which means the reduced effectiveness of rear brakes may not be immediately noticeable. However, during a panic stop, the extended stopping distance can be incredibly dangerous, potentially leading to accidents and injuries.

Common Causes of Rear Brake Failure

Brakes can fail or wear out just like any other component. Some common reasons for rear brake failure include:

Pads Wearing Thin

Pads can wear thin over time, leading to metal-to-metal contact between the brake shoe and the brake drum. This is a sign that new brake pads are needed, and depending on the extent of wear, new rotors may also be required.

Hydraulic Leaks or Plugged Hose

Hydraulic leaks in the brake line or a plugged swolen hose can cause a buildup of fluid, leading to a malfunction of the brake system. This is another common reason for rear brake failure.

Handbrake Cable Wear

A worn handbrake cable can cause premature wear on the rear brake pads, leading to further damage and potentially failing parts. Regular inspection and maintenance can prevent this from happening.

Preventing Further Damage and Ensuring Safety

To prevent further damage and ensure vehicle safety, it is crucial to address any issues with the rear brakes as soon as they are noticed. Regular brake inspections, replacing worn components, and addressing any hydraulic issues can help maintain the integrity of the braking system.

Driving with inoperable or worn rear brakes is dangerous. The addition of hydraulic force and the need for emergency braking can exacerbate the problem, making it more likely for damage to occur. Prompt maintenance and frequent inspections can help prevent these issues and ensure that your vehicle remains safe on the road.